Potential Problem Areas widget

What is the Potential Problem Areas widget?

You can use this widget to quickly see a list of any points in the equipment that are not operating appropriately. You can also use this widget to investigate and manage faults that occur on your site.
Note: Faults are available only when licensed.

Who can access the Potential Problem Areas widget?

You do not require a license to access the Points tab of the widget, unless you use an Open Application Server (OAS). For an OAS, you require the Metasys Potential Problem Areas license to access Potential Problem Areas Points. The widget itself may additionally include two separate licensable features, namely Fault Detection and Fault Triage. You require the Metasys Fault Detection and the Metasys Fault Triage licenses to access both Fault Detection and Fault Triage. You can use Fault Detection without a Fault Triage license, but you require both licenses for Fault Detection and Fault Triage to use Fault Triage.

Note: Fault Detection and Fault Triage are not included with any server. You must purchase these features separately.
Important: After licensing the Fault Detection feature and the Fault Triage feature, there is a brief delay before the faults become visible. Log out of Metasys UI and back in, if you were logged in when the feature was licensed.
The following table outlines the various combinations of licenses and feature availability and behavior.
Table 1. Potential Problem Areas feature availability and behavior by license
License Feature availability and behavior
Potential Problem Areas Fault Detect-ion Fault Triage Potential Problem Areas widget Points tab Faults tab Fault list order and catego-rization Worst fault rollup Fault sup-pression Fault occur-rence Fault duration Fault Triage Fault Manager
No1 No No
No No Yes
No Yes No 2 S3
No Yes Yes 2 S, O, D4
Yes5 No No 6
Yes No Yes 6
Yes Yes No S 3
Yes Yes Yes S, O, D 4
Note: Whenever both the Potential Problem Areas Points and Faults are licensed, the Faults tab becomes the default tab. Simply click on the Points tab to view Points.

How do I access the Potential Problem Areas widget?

You can find the Potential Problem Areas widget on any Space dashboard.

What is the layout of the Potential Problem Areas widget?

The following figures and tables describe the layout of the Potential Problems Areas widget when all features are licensed. See Table 1 for more details.

Figure: Potential Problem Areas widget - Faults tab fully licensed
Table 2. Potential Problem Areas widget - Faults tab

Number

Name

Description

1

Faults tab

 This tab displays only if you have the Potential Problem Areas (license required on OAS only) and the Fault Detection license. When Fault Detection is licensed, then this is the default tab. It shows a detailed list of faults.

2

Points tab

 This tab displays only if you have the Potential Problem Areas (license required on OAS only) and the Fault Detection license. View a list of any points within the space that is not operating appropriately. See Figure 2 for more information.

3

Fault
If Fault Detection is licensed, you see the following information:
  • Worst fault name: The name of the fault with the highest severity for the item related to an equipment.
  • Fault severity category: critical (red), high (orange), medium (yellow), low (gray)
  • Total faults for this equipment: Hover over the number to see all the additional faults to the worst fault.
  • Suppressed faults: The number of faults on served systems which, by default, are not shown in the fault list. Expose suppressed faults by selecting the Suppressed Faults filter.
  • Equipment link and space(s) link

You can see additional information when Fault Triage is also licensed:

  • Worst fault name: The name of the fault with the highest rank for the item related to an equipment.
  • Fault rank category (in place of Fault severity category). The rank is calculated not only by fault severity, but it takes duration and occurrences into account for the list order and determination of critical, high, medium, or low.
  • Fault link to Fault Triage. See What is Fault Triage? for more information.
  • Number of occurrences
  • Total duration
  • Resolution progress and re-occurrence indication

4

Export button

Exports the fault data in the Potential Problem Areas widget to a .csv file.

Note: The export functionality is not supported on tablets or smartphones.

5

Filter

Determines the faults that appear in the widget. You can filter the faults by severity or rank, such as Critical, High, Medium, and Low. You can also filter the faults by fault types, such as AHU, VAV, FCU, RTU, and Suppressed Faults.

Note: In certain cases, when you filter for High and Low faults, you may not get results for Low faults, due to the worst fault roll up functionality.

See also How does the Suppressed Faults filter in the Faults tab work? for more information about filtering for suppressed faults.

6

Equipment/ Spaces(s)

 Shows the equipment and the spaces that are affected by the fault. The hyperlink takes you to the equipment or space.

7

 Disable menu This icon displays for Administrator users only. Administrator users can click this icon to display a menu and choose between the following disable options:
  • Disable this Fault Rule for this Equipment
  • Disable all Fault Rules for this Equipment
  • Disable this Fault Rule for all Equipment
An Administrator user can use the Fault Manager to enable pieces of equipment which have previously been disabled.
Note: When you disable a fault rule for all equipment, the rule is disabled, but the exceptions table in the Fault Manager does not list the equipment for which the rule is disabled.

8

Occurrence icon

 Shows the number of times that this fault has occurred within the last seven days.

9

Fault categorization bar

 Shows the categorization of a fault: critical fault = red, high fault = orange, medium fault = yellow, low fault = gray.

10

Duration icon

 Shows the total duration of all occurrences of the fault within the last seven days.

11

Status icon

 Shows if work on this issue is in progress, or if the fault has reoccurred.

12

Faults drop-down menu

The default option By Equipment (Top Severity) or By Equipment (Top Rank) displays a compressed list of faults. Only the worst fault is displayed in the list for each equipment and additional faults can be viewed by hovering over Total. Select All (Severity) or All (Ranked) to see the expanded list, which includes multiple faults for the same equipment.

13

Fault time frame

Displays the time frame for which the faults in the list are reporting about. The default time frame is Last 7 Days.
Note: Each page can contain a maximum of 25 fault entries. If there are more than 25 fault entries, use the paging arrows in the upper-left of the widget to navigate to the next page.
Figure: Potential Problem Areas widget - Points tab
Table 3. Potential Problem Areas widget - Points tab

Number

Name

Description

1

Data columns
Shows the following:
  • Item: short name and long name of point that is abnormal
  • Value: status and present value with a hyperlink to the Command window
  • Equipment/Spaces: equipment name (where the abnormal point resides) and associated spaces with hyperlinks to navigate to the equipment and spaces

2

 Refresh button The points are on a refresh cycle that lasts approximately 30 minutes. When this cycle expires, a Refresh button displays next to the Export button. Click or tap the Refresh button to display the updated data. You can also refresh the browser to display the updated data.

3

Export button

Exports the point's data in the Potential Problem Areas widget to a .csv file.

Note: The export functionality is not supported on tablets or smartphones.

4

Data expires timer

Indicates when the report of points data expires. The report of data expires approximately every 30 minutes. If the report data has expired (as seen by 0 minutes), you can refresh the data by clicking or tapping the refresh button.

5

Filter

Determines the point statuses that appear in the widget. You can filter the points by Above Setpoint, Alarm, Below Setpoint, Offline, Out of Service, Overridden, Trouble/Warning, and Value Inaccessible.

6

Status bar

Shows the status of the point using the Metasys system preference colors.

7

Data generated timer

The data displayed in this view does not automatically refresh. This timer indicates when this report of data was taken. See also the entries in this table for Refresh button and Data expires timer.

What information appears for each point?

The following information appears for each point that is in a status other than normal.

  • Point status (listed under the Item column along with the associated color bar)
  • Point short name and long name (listed under the Item column)
  • Points that are Offline will show the last value that was stored within the previous seven days. If no values were stored within that time frame, no value will be shown.
  • Equipment that contains the point
  • Spaces that are served by this equipment

How current is the data in the Faults tab?

The system gathers data and creates faults approximately every 60 minutes on the hour, but in the Potential Problem Areas widget you only see the faults at the time of page load. You can refresh the browser to display the updated data. This action refreshes the list after the next periodic event has occurred.

How current is the data in the Points tab?

The data is a report (also known as a snapshot). A date and time stamp shows the last time the report of data was updated. The points are on a refresh cycle that lasts approximately 30 minutes. When this cycle expires, a Refresh button displays next to the Export button in the Points tab of the Potential Problem Areas widget. Click or tap the Refresh button to display the updated data. You can also refresh the browser to display the updated data.

Can I sort the data?

In the Points tab you can sort the columns in ascending or descending alphanumeric order by tapping or clicking the column header. Sorting applies to all pages of data and not just the current page. You cannot sort the data in the Faults tab, because the fault list order is intended to drive the worst faults to the top of the list. You can modify the fault list with filters only.

Why don't I see any faults?

There can be several reasons why you may not see any faults. First, make sure that all criteria are met for a given fault. When no faults occur, it is likely that a short name was not properly mapped to its semantic data point model. If your site uses point names that deviate from the Johnson Controls standard, you may need to use the Point Setting file in SCT to configure your point short names. See the Updating point settings section in System Configuration Tool Help (LIT-12011964) for more information.

What is fault suppression?

If there is a fault associated with an Air Handling Unit (AHU), there is presumably a problem with downstream terminal units. In an effort to minimize the fault list to a size that is manageable, the fault suppression functionality filters the downstream faults and shows you the associated parent faults only. You need to address those faults first in any event to ensure that the associated downstream faults are actual issues at the terminal unit. Fault suppression creates a short, succinct list of faults and this makes the troubleshooting process more efficient.
Note: Equipment serving relationships are required for the suppression feature. Also, the served system fault must be within the fault duration of the serving system fault in order for suppression to occur. A VAV which faults before an AHU fault will not be suppressed by the AHU fault and show up in the fault list.
The following table describes the suppression relationship between fault rules. YES indicates that a fault is suppressed by a fault rule. - indicates that a fault is not suppressed by another fault rule.
Table 4. Fault suppression relationships
Suppressing fault rules Suppressed fault rules
VAV Insufficient Heating Capacity VAV Insufficient Flow Capacity VAV Low Zone Temperature VAV High Zone Temperature VAV High Flow VAV Low Flow VAV Zone CO2 Level is Too High VAV Zone Humidity is Outside of Comfort Limits
AHU Insufficient Heating Capacity YES - YES - - - - YES
AHU Not Running when Occupied - YES - - - YES - YES
AHU Mixed Air Dampers are Stuck Closed - - - - - - YES -
AHU High Supply Pressure YES - YES - YES - - -
AHU Insufficient Fan Capacity - YES - YES - YES YES YES
AHU Zone CO2 Level is Too High - - - - - - YES -
AHU Low Supply Pressure - YES - YES - YES YES YES
AHU Low Discharge Air Temperature YES - YES - - - - YES
AHU High Discharge Air Temperature - - - YES - - - YES
AHU Outdoor Air Minimum Flow is Too Low - - - - - - YES -
AHU Return CO2 Level is Too High - - - - - - YES -
AHU Low Return Air Temperature YES - YES - - - - YES
AHU High Return Air Temperature - - - YES - - - YES
AHU Humidity Setpoint is Outside of Comfort Limits - - - - - - - YES
AHU Return Humidity is Outside of Comfort Limits - - - - - - - YES

How does the Suppressed Faults filter in the Faults tab work?

You can select the Suppressed Faults filter only in combination with the fault types filters AHU and VAV only. You can also select the Suppressed Faults filter in combination with the various rank filters. The following table outlines the behavior of the Suppressed Faults filter in more detail:
Table 5. Faults displayed by suppression filter combination
Filters Displayed faults
AHU VAV Critical High Medium Low Suppressed Faults
Selected - - - - - Selected AHU faults and suppressed VAV faults
- Selected - - - - Selected VAV faults and suppressed VAV faults
- - Selected - - - Selected All faults, including suppressed, that are critical
- - Selected - - Selected All faults, including suppressed, that are high
- - - - Selected - Selected All faults, including suppressed, that are medium
- - - - - Selected Selected All faults, including suppressed, that are low
- - - - - - - Any non-suppressed faults that match other selected filters, such as FCU and RTU

What does it mean when a point has a status of Value Inaccessible or Value Cannot be Read?

If an online point has a status of Value Inaccessible or Value Cannot be Read, the Metasys UI is unable to gain access to the point. If the point is offline, it shows an Offline status.

If many points show this status, there may be a communication problem with the Metasys site or with the network engine on the site.
Note: Metasys UI 5.0 cannot read values from engines that are at Metasys Release 3.0 or earlier. This means that online points, engines, or controllers associated with a network engine that is at Release 3.0 or earlier can have a status of Value Inaccessible or Value Cannot be Read.

How do I export the data in the Potential Problem Areas widget?

You can export the fault's data and the point's data separately in the Potential Problem Areas widget to a .csv file. Simply click the Export button in the upper-right corner of the screen on both the Faults tab and the Points tab.

Note: The export functionality is not supported on tablets or smartphones.

Is the Potential Problem Areas widget supported on all devices?

Yes, the Potential Problem Areas widget is supported on desktop, tablets, and smartphones.

What is Fault Triage?

Fault Triage provides a unique view, which provides additional information on a particular fault, corrective actions in the order of their likeliness to resolve the issue, a description of the fault, charting of supporting data, and an activity log to track progress. Fault Triage also enhances the sorting order and information in the Faults tab of the Potential Problem Areas widget to introduce fault occurrences and durations to better drive the most problematic issues to the top of the list.

Who can access Fault Triage?

You require both the Metasys Fault Detection and the Metasys Fault Triage license to access the feature.

How can I access Fault Triage?

  1. Navigate to the Potential Problem Areas widget on the Space dashboard.
  2. In the Faults tab, click or tap the hyperlinked fault that you want to investigate.
  3. The Fault Triage window opens in a new tab.

What is the layout of the Fault Triage window?

The following figure and table outline the layout of the Fault Triage window.
Figure: Fault Triage layout
Table 6. Fault Triage callouts

Number

Name

Description

1

Details

This section shows the affected equipment and spaces served by the equipment, including hyperlinks to the relevant equipment and space(s). It also shows the total duration of all fault occurrences within the previous seven days, and the total occurrences of the fault within the previous seven days.

As an Administrator user, you can also access the Fault Manager from the Details section. See What is the Fault Manager? for more information about viewing fault rules, managing global attributes, and using the Import and Export feature.

As an Administrator user, you can click or tap the Disable menu (three vertical dots) to display a menu, which gives you the ability to disable this fault rule for this equipment, disable all fault rules for this equipment, and disable this fault rule for all equipment.

Note: When you disable a fault rule for all equipment, the rule is disabled, but the exceptions table in the Fault Manager does not list the equipment for which the rule is disabled.

2

Possible Causes
Any given fault can occur as a result of a number of given root causes. A group of a half dozen Johnson Controls HVAC Controls technical experts from across North America with a combined experience of over 150 years provided the following input for the Fault Triage feature:
  • A list of the most common possible causes for any given fault.
  • The likeliness of any given possible cause based on their individual experiences.
  • Corrective actions for the possible causes.
    Warning: Recommendations for corrective action are not a guarantee of fault resolution; always follow applicable safety procedures and, when necessary, contact your JCI representative for assistance.

See How do I take action on a fault? for more information.

3

Fault Name and Description

 This section shows you the fault name and the criteria that must be met for the fault to occur. See What types of fault rules are there? What data is required for each fault to occur? for a list of all fault names and corresponding criteria. See also How do I modify fault rule attributes in the Fault Manager? to learn more about changing global attributes.

4

Charting

This is an auto-generated chart that is provided with each fault occurrence. The chart displays pertinent data before, during, and after the fault occurs.

Use the arrow buttons to see data from each fault occurrence. The first page displays the most recent fault.

Stacked charting provides the following information, as appropriate:

  • Top chart – Process variable and setpoint(s)
  • Middle chart – Analog outputs
  • Bottom chart – Binary or enumerated outputs
Note: Line marker fill colors are colored to indicate non-normal status. Tool tips provide a list of all the data at that point in time. You can hide or unhide individual data points.

See What information is provided in the Fault Triage trend charts for each fault? and How does Fault Triage charting differ from Trends or from a Trend Study? for more information.

5

Activity

This log shows the fault occurrences, including the date and time it first occurred, along with the fault duration of that occurrence. The log also shows the corrective action progress, as any corrective action marked TRIED or SOLVED ISSUE appears with the user name and time stamp. You can also see user notes, which can give you more information about an issue and corrective actions. Click +ADD NOTE to add a user note.

Note: The Equipment Activity widget and System Activity do not display activity items for faults.

How do I take action on a fault?

  1. Click or tap on a fault listed in the Potential Problem Areas widget. The Fault Triage window opens in a new tab.
  2. In the Fault Triage window, navigate to the Possible Causes section.
  3. Expand the possible causes to see further causes and suggested corrective actions.
  4. Try the corrective actions as appropriate.
  5. Click or tap NOT TRIED, TRIED, and SOLVED ISSUE to log your action. The action log displays in the Activity section in the lower right of your screen.
  6. It is also best practice to add a note in the Activity log, especially when the possible cause was Other.

For example, the fault AHU Low Discharge Air Temperature can be caused by Heating is not working properly, and that in turn can be caused by Dirty coil (exterior). Fault Triage suggests to Clean exterior of coil to rated pressure drop. If you believe this to have been the root cause of the fault then mark the solution with SOLVED ISSUE. The selection persists until the fault reoccurs, but the instance of the fault is removed from the list after seven days. If indeed cleaning the coil was not the root cause, or if other factors were involved, the fault will reappear in the fault list within seven days after being marked solved with a status of Reoccurred. The previous selections on other root causes will be persisted and the Clean exterior of coil to rated pressure drop selection will be automatically marked as TRIED.

What is the Fault Manager?

The Fault Manager is closely linked to Fault Triage. You can view, enable, and disable all fault rules in the Fault Manager. You can modify global attributes and you can also download an archive of global attributes, exceptions, and activity logs, and you can import an archive to restore data from a previous archive.

Who can access the Fault Manager?

Only Administrator users can access the Fault Manager. You also require the Metasys Fault Detection license to access the Fault Manager.

How can I access the Fault Manager?

  1. Open the User menu.
  2. Tap or click Administrative Tasks.
  3. Tap or click Fault Manager.

You can also access the Fault Manager in the Details section of the Fault Triage window.

What is fault severity and how is it used?

To find out about fault severity go to the Fault Manager first, as the Fault Manager lists the fault rules based on severity. The worst faults are at the top of the list, while minor faults, such as energy saving opportunities, are listed towards the bottom of the list.

The order of the faults in the Faults tab of the Potential Problem Areas widget is also by severity, if Fault Triage is not licensed. When Fault Triage is licensed, the fault duration and occurrences are also factored into the order of the faults displayed in the Faults tab of the Potential Problem Areas widget.

The following figure shows the difference between the Potential Problem Areas widget when Fault Triage is not licensed and when it is licensed, respectively.
Figure: Potential Problem Areas widget view comparison
The following table lists the fault rules by severity.
Table 7. Fault rules by severity
Rule Severity Color
1 AHU Mixed Air Dampers are Stuck Open Critical Red
2 AHU Insufficient Heating Capacity
3 AHU Not Running when Occupied
4 AHU Mixed Air Dampers are Stuck Closed
5 AHU High Supply Pressure
6 AHU Insufficient Fan Capacity
7 AHU Zone CO2 Level is Too High High Orange
8 AHU Low Supply Pressure
9 AHU Low Discharge Air Temperature
10 AHU High Discharge Air Temperature
11 AHU Building Static Pressure is Too Low
12 AHU Building Static Pressure is Too High
13 AHU Outdoor Air Minimum Flow is Too Low
14 AHU Return CO2 Level is Too High
15 AHU Low Return Air Temperature
16 AHU Low Zone Temperature
17 AHU High Return Air Temperature
18 AHU High Zone Temperature
19 AHU Outdoor Air Minimum Flow is Too High
20 AHU Zone Humidity is Outside of Comfort Limits
21 AHU Return Humidity Outside of Comfort Limits
22 RTU Insufficient Heating Capacity
23 RTU Not Running when Occupied
24 RTU Zone CO2 Level is Too High
25 RTU Low Discharge Air Temperature
26 RTU High Discharge Air Temperature
27 RTU Return CO2 Level is Too High
28 RTU Low Return Air Temperature Medium Yellow
29 RTU High Return Air Temperature
30 RTU Low Zone Temperature
31 RTU High Zone Temperature
32 RTU Zone Humidity is Outside of Comfort Limits
33 RTU Return Humidity is Outside of Comfort Limits
34 FCU Insufficient Heating Capacity
35 FCU Low Zone Temperature
36 FCU High Zone Temperature
37 VAV Insufficient Heating Capacity
38 VAV Insufficient Flow Capacity
39 VAV Low Zone Temperature
40 VAV High Zone Temperature
41 VAV High Flow
42 VAV Low Flow
43 VAV Zone CO2 Level is Too High
44 VAV Zone Humidity is Outside of Comfort Limits
45 AHU Humidity Setpoint is Outside of Comfort Limits Low Gray
46 AHU Mechanically Cooling without using Economizer
47 AHU Constantly Running
48 AHU Return Temperature Heating Setpoint is Too High
49 AHU Zone Temperature Heating Setpoint is Too High
50 AHU Return Temperature Cooling Setpoint is Too Low
51 AHU Zone Temperature Cooling Setpoint is Too Low
52 RTU Humidity Setpoint is Outside of Comfort Limits
53 RTU Mechanically Cooling without using Economizer
54 RTU Constantly Running
55 RTU Return Temperature Heating Setpoint is Too High
56 RTU Return Temperature Cooling Setpoint is Too Low
57 RTU Zone Temperature Heating Setpoint is Too High
58 RTU Zone Temperature Cooling Setpoint is Too Low
59 FCU Simultaneously Heating and Cooling
60 FCU Heating or Cooling While a Window is Open
61 FCU A Window is Open While Unoccupied
62 FCU Zone Temperature Heating Setpoint is Too High
63 FCU Zone Temperature Cooling Setpoint is Too Low
64 VAV Zone Temperature Heating Setpoint is Too High
65 VAV Zone Temperature Cooling Setpoint is Too Low

How do I learn more about a fault rule and its exceptions in the Fault Manager?

  1. Click or tap on a fault rule listed in the FAULT RULES column. The FAULT RULE window opens.
  2. Review the details about what triggers this rule, the attributes of the rule, and the exceptions of the rule.
    Note: An exception is a piece of equipment for which a rule is disabled.

How can I turn a fault rule on or off?

This can be done in multiple ways:

  • With the Disable menu (three vertical dots), which is displayed next to a Fault in the Potential Problem Areas widget Faults tab, if you are logged in as an Administrator user.
  • With the Disable menu (three vertical dots), which is displayed in the Details section of Fault Triage, if you are logged in as an Administrator user.
  • With the ENABLE/DISABLE toggles in the Fault Manager. You can perform this action on a rule-by-rule basis, or in bulk by using the toggle in the header.
  • With the ENABLE/DISABLE toggle in the FAULT RULE window in the Fault Manager.
Note: When you disable a fault rule for all equipment, the rule is disabled, but the exceptions table in the Fault Manager does not list the equipment for which the rule is disabled.

How do I enable exceptions (equipment that has been disabled) in the Fault Manager?

  1. Click or tap on a fault rule listed in the FAULT RULES column. The FAULT RULE window opens.
  2. Navigate to the exceptions table at the bottom of the window.
  3. Select the equipment that you want to enable the fault for.
  4. Click or tap the toggle in the ENABLE/DISABLE column as appropriate.
  5. Click SAVE to save your changes.

How do I filter fault rules in the Fault Manager?

  1. Click or tap FILTER in the upper-right corner of the screen.
  2. Select the equipment type(s) that you want to filter for.

How do I modify fault rule attributes in the Fault Manager?

  1. Click or tap GLOBAL ATTRIBUTES in the upper-right corner of the screen. The GLOBAL ATTRIBUTES SETTINGS window opens.
  2. Hover your cursor over the attribute to see a description of the attribute.
  3. Hover your cursor over the faults data in the ASSIGNED TO column to check the fault rules that this attribute relates to.
    Important: Changes to an attribute affect all assigned to fault rules.
  4. Change the value in the VALUE column.
  5. Click or tap SAVE to keep and save your changes.
    Note: Click or tap RESET VALUES to revert your changes to the default values. The default values take into account rounding and calibration values typically found in the field.

How can I back up the changes I make in the Fault Manager?

Important: Metasys Server uploads and downloads do not carry Fault Manager data. Make sure to create an export file each time the data is changed, so that you can restore the data as necessary.
You can export an .archive file of global attributes, exceptions, and activity logs.
  1. Click ARCHIVE in the upper-right corner of the Fault Manger. The ARCHIVE window opens.
  2. Click EXPORT to download the .archive file.

How do I import backed up Fault Manager data?

You can import a Fault Manager archive to restore data from a previous archive.
Important: An import overwrites existing data.
  1. Click ARCHIVE in the upper-right corner of the Fault Manger. The ARCHIVE window opens.
  2. Click Choose File and select the .archive file you want to import.
  3. Click IMPORT.

What is the difference between a Metasys alarm and a Metasys fault?

Alarm: Alarm extensions provide a way to notify a user when system points exceed configured thresholds. You can manually enter thresholds or you can base the thresholds on an additional point, such as a control setpoint. The thresholds can also include reporting delays. The Alarm Manager handles management of alarms, including acknowledgment, discards, and annotations.

Fault: Faults can utilize more system points, delays, and thresholds that are directly related to each individual fault. Faults are not included in Alarm Management, but in the Potential Problem Areas widget.

The following table outlines the differences between an alarm and a fault in more detail.
Table 8. Differences between an alarm and a fault
Aspects Alarm Fault
Logic Finite data, thresholds, and delays Expanded and focused data, thresholds, and delays
Sample time Exact Binning: all data samples are put in five minute bins. For example, if a fault occurs at 12:03 it is registered in the 12:00 bin.
Detection frequency Immediately annunciated by the event Events are evaluated at fixed intervals. Faults are evaluated at fixed intervals.
Notification Immediate through the alarm icon and entry in Alarm Manager or Alarm Monitor Fixed interval on Potential Problem Areas widget Faults tab, rolling seven days
Prioritization Alarm priority Fault severity, Fault rank
Management Alarm Manager: acknowledge, discard, or annotate alarms
  • Potential Problem Areas widget and Fault Manager: enable, disable fault rules
  • Fault Triage: take corrective actions in the order of their likeliness to resolve the issue

Although alarms and faults are similar, faults provide a "smarter" indication of building system issues. Utilizing both faults and alarms within your Metasys system can increase productivity and greatly minimize nuisance problem reporting. A fault can help you determine if an alarm is justified. You can use the fault findings to fine tune the alarm settings. When you manage a site, consider looking more closely at faults and reserve alarms for reporting issues that are truly alarming.

For example, regarding a temperature threshold, you can eliminate nuisance and spurious alarms by using faults to determine if a piece of equipment is still failing to achieve setpoint after it has had time to ramp up to a stable state. You can then create alarms for the space, which detect real emergencies.

What types of fault rules are there? What data is required for each fault to occur?

The following table outlines the fault rules and the semantic point model required for each fault to occur. You may need to use the Point Setting file in SCT to configure your point short names. See the Updating point settings section in System Configuration Tool Help (LIT-12011964) for more information.
Table 9. Fault rules summary
Fault Rule All of the following criteria must be met in order for the respective fault to occur7 Required semantic point model
AHU Building Static Pressure is Too High
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Building Static Pressure must be greater than the Building Static Pressure Setpoint multiplied by one plus the Building Static Pressure Error Comparison divided by 100 for longer than the Minimum Fault Time Delay time
  • Building Static Pressure
  • Building Static Pressure Setpoint
  • Supply Fan Status or Supply Fan Command
AHU Building Static Pressure is Too Low
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Building Static Pressure must be less than the Building Static Pressure Setpoint multiplied by one minus the Building Static Pressure Error Comparison divided by 100 for longer than the Minimum Fault Time Delay time
  • Building Static Pressure
  • Building Static Pressure Setpoint
  • Supply Fan Status or Supply Fan Command
AHU Constantly Running This fault occurs any time that the Supply Fan is running for longer than the Equipment Excessive Runtime time. It is intended to identify systems which should be shutting down and not doing so. Disable this fault for any systems which must always run.
  • Supply Fan Status or Supply Fan Command
AHU High Discharge Air Temperature8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Discharge Air Temperature must be greater than the sum of the Discharge Air Temperature Setpoint and the Discharge Air Temperature Error for longer than the Minimum Fault Time Delay time
  • Discharge Air Temperature
  • Effective Discharge Air Temperature Setpoint or Discharge Air Temperature Setpoint
  • Supply Fan Status or Supply Fan Command
AHU High Return Air Temperature 8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Return Air Temperature must be greater than the sum of the Return Air Temperature Setpoint and the Return Air Temperature Error for longer than the Minimum Fault Time Delay time
  • Return Air Temperature
  • Effective Cooling Temperature Setpoint or Return Air Temperature Setpoint
    Note: Return Air Temperature Setpoint must be present.
  • Supply Fan Status or Supply Fan Command
AHU High Supply Pressure
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The lowest Discharge Air Pressure must be greater than the Effective Discharge Air Pressure Setpoint multiplied by one plus the Discharge Air Pressure Error Comparison divided by 100 for longer than the Minimum Fault Time Delay time
  • Effective Discharge Air Static Pressure or Discharge Air Static Pressure (lowest)
  • Discharge Air Static Pressure Setpoint
  • Supply Fan Status or Supply Fan Command
AHU High Zone Temperature 8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Zone Air Temperature must be greater than the sum of the Zone Air Temperature Setpoint and the Zone Temperature Error for longer than the Minimum Fault Time Delay time
  • Effective Zone Temperature or Zone Temperature
  • Effective Cooling Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
  • Supply Fan Status or Supply Fan Command
AHU Humidity Setpoint is Outside of Comfort Limits
  1. The Humidification or Dehumidification Setpoint is above the Humidity Comfort Maximum attribute
  2. The Humidification or Dehumidification Setpoint is below the Humidity Comfort Minimum attribute
  • Humidity Setpoint and/or Dehumidification Setpoint
AHU Insufficient Fan Capacity
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The lowest Discharge Air Pressure must be less than the Effective Discharge Air Pressure Setpoint multiplied by one minus the Discharge Air Pressure Error Comparison divided by 100 for longer than the Minimum Fault Time Delay time
  3. The Supply Fan Output is equal or greater than the Maximum Supply Fan Speed Position for greater than the Supply Fan Full Speed Delay time
  • Effective Discharge Air Static Pressure or Discharge Air Static Pressure (lowest)
  • Discharge Air Static Pressure Setpoint
  • Supply Fan Percent Command
  • Supply Fan Status or Supply Fan Command
AHU Insufficient Heating Capacity
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Discharge Air Temperature must be less than the difference of the Discharge Air Temperature Setpoint and the Discharge Air Temperature Error for longer than the Minimum Fault Time Delay time
  3. All Heating Outputs must be greater than or equal to the Heating Maximum Position for greater than the Heating Maximum Delay time
  • Discharge Air Temperature
  • Effective Discharge Air Temperature Setpoint or Discharge Air Temperature Setpoint
  • (Preheat Valve Position or Preheat Valve Percent Command) and/or (Reheat Valve Position or Reheat Valve Percent Command)
  • Supply Fan Status or Supply Fan Command
AHU Low Discharge Air Temperature 8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Discharge Air Temperature must be less than the difference of the Discharge Air Temperature Setpoint and the Discharge Air Temperature Error for longer than the Minimum Fault Time Delay time
  • Discharge Air Temperature
  • Effective Discharge Air Temperature Setpoint or Discharge Air Temperature Setpoint
  • Supply Fan Status or Supply Fan Command
AHU Low Return Air Temperature 8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Return Air Temperature must be less than the difference of the Return Air Temperature Setpoint and the Return Air Temperature Error for longer than the Minimum Fault Time Delay time
  • Return Air Temperature
  • Effective Heating Temperature Setpoint or Return Air Temperature Setpoint
    Note: Return Air Temperature Setpoint must be present.
  • Supply Fan Status or Supply Fan Command
AHU Low Supply Pressure
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The lowest Discharge Air Pressure must be less than the Effective Discharge Air Pressure Setpoint multiplied by one minus the Discharge Air Pressure Error Comparison divided by 100 for longer than the Minimum Fault Time Delay time
  • Effective Discharge Air Static Pressure or Discharge Air Static Pressure (lowest)
  • Discharge Air Static Pressure Setpoint
  • Supply Fan Status or Supply Fan Command
AHU Low Zone Temperature 8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Zone Air Temperature must be less than the difference of the Zone Air Temperature Setpoint and the Zone Temperature Error for longer than the Minimum Fault Time Delay time
  • Effective Zone Temperature or Zone Temperature
  • Effective Heating Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
  • Supply Fan Status or Supply Fan Command
AHU Mechanically Cooling without using Economizer
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Mixed Air Damper Output is less than the Damper Open Position for longer than the Minimum Fault Time Delay time
  3. The Cooling Output is greater than the Cooling Minimum Position for longer than the Minimum Fault Time Delay time
  4. The Outdoor Air Temperature is less than the Economizer Switchover Temperature for longer than the Minimum Fault Time Delay time
  • Outdoor Air Temperature
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Cooling Valve Position or Cooling Valve Percent Command
  • Supply Fan Status or Supply Fan Command
AHU Mixed Air Dampers are Stuck Closed
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Mixed Air Damper Output is greater than the Outdoor Air Damper Minimum Position for longer than the Minimum Fault Time Delay time
  3. The difference between the Return Air Temperature and Mixed Air Temperature is less than the Mixed Air Temperature Comparison Threshold for longer than the Minimum Fault Time Delay time
  4. The Preheat Output (if present) is less than or equal to the Heating Minimum Position
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Return Air Temperature
  • Mixed Air Temperature
  • [Optional] Preheat Valve Position or Preheat Valve Percent Command
  • Supply Fan Status or Supply Fan Command
AHU Mixed Air Dampers are Stuck Open
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Mixed Air Damper Output is less than or equal to the Outdoor Air Damper Minimum Position for longer than the Minimum Fault Time Delay time
  3. The difference between the Outdoor Air Temperature and Mixed Air Temperature is less than the Mixed Air Temperature Comparison Threshold for longer than the Minimum Fault Time Delay time
  4. The Preheat Output (if present) is less than or equal to the Heating Minimum Position
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Outdoor Air Temperature
  • Mixed Air Temperature
  • [Optional] Preheat Valve Position or Preheat Valve Percent Command
  • Supply Fan Status or Supply Fan Command
AHU Not Running when Occupied
  1. The system must be 'Occupied'
  2. The Supply Fan is not running for longer than the Equipment Excessive Downtime time.
  • Supply Fan Status or Supply Fan Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
AHU Outdoor Air Minimum Flow is Too High
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The AHU Temperature Control State must be in any mode except the following:
    1. Econ
    2. Econ+Mech
    3. Cooling Idle
    4. Heating Idle
  3. The Outdoor Air Flow must be greater than the Minimum Outdoor Air Flow Setpoint multiplied by one plus the Air Flow Error Setpoint Comparison divided by 100 for longer than the Minimum Fault Time Delay time
  • Outdoor Air Flow
  • Outdoor Air Minimum Flow Setpoint
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
AHU Outdoor Air Minimum Flow is Too Low
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The AHU Temperature Control State must be in any mode except the following:
    1. Econ
    2. Econ+Mech
    3. Cooling Idle
    4. Heating Idle
  3. The Outdoor Air Flow must be less than the Minimum Outdoor Air Flow Setpoint multiplied by one minus the Air Flow Error Setpoint Comparison divided by 100 for longer than the Minimum Fault Time Delay time
  • Outdoor Air Flow
  • Outdoor Air Minimum Flow Setpoint
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
AHU Return CO2 Level is Too High
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Return CO2 level exceeds the CO2 Level Maximum for longer than the Minimum Fault Time Delay time
  • Return Air CO2
  • Supply Fan Status or Supply Fan Command
AHU Return Humidity is Outside of Comfort Limits
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. Either condition below occurs for longer than the Minimum Fault Time Delay time
    1. The Return Humidity exceeds the Humidity Comfort Maximum
    2. The Return Humidity drops below the Humidity Comfort Minimum
  • Return Air Humidity
  • Supply Fan Status or Supply Fan Command
AHU Return Temperature Cooling Setpoint is Too Low 8 This fault occurs any time that the Effective Cooling Temperature Setpoint is below the Return Temperature Setpoint Minimum attribute.
  • Return Air Temperature Setpoint
    Note: This point is absolutely necessary.
  • Effective Cooling Temperature Setpoint
AHU Return Temperature Heating Setpoint is Too High 8 This fault occurs any time that the Effective Heating Temperature Setpoint is above the Return Temperature Setpoint Maximum attribute.
  • Return Air Temperature Setpoint
    Note: This point is absolutely necessary.
  • Effective Heating Temperature Setpoint
AHU Zone CO2 Level is Too High
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Zone CO2 level exceeds the CO2 Level Maximum for longer than the Minimum Fault Time Delay time
  • Zone CO2
  • Supply Fan Status or Supply Fan Command
AHU Zone Humidity is Outside of Comfort Limits
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. Either condition below occurs for longer than the Minimum Fault Time Delay time:
    1. The Zone Humidity exceeds the Zone Humidity Comfort Maximum
    2. The Zone Humidity drops below the Zone Humidity Comfort Minimum
  • Zone Humidity
  • Supply Fan Status or Supply Fan Command
AHU Zone Temperature Cooling Setpoint is Too Low 8 This fault occurs any time that the Effective Cooling Temperature Setpoint is below the Zone Temperature Setpoint Minimum attribute.
  • Effective Cooling Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
AHU Zone Temperature Heating Setpoint is Too High 8 This fault occurs any time that the Effective Heating Temperature Setpoint is above the Zone Temperature Setpoint Maximum attribute.
  • Effective Heating Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
FCU A Window is Open While Unoccupied
  1. The system must be 'Unoccupied' for a minimum of the Minimum Occupied Time Delay time
  2. The system is in Energy Hold Off Mode or indication that a window is open for longer than the Minimum Fault Time Delay time
  • Energy Hold Off Mode Status or Energy Hold Off Mode Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
FCU Heating or Cooling While a Window is Open
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The system is in Energy Hold Off Mode or indication that a window is open for longer than the Minimum Fault Time Delay time
  3. Any of the following has occurred for longer than the Minimum Fault Time Delay time
    1. The Cooling Output must be greater than the Cooling Minimum Position
    2. The Heating Output must be greater than the Heating Minimum Position
    3. The Common Heating Cooling Output must be greater than the Heating Minimum Position
  • Heating Valve Percent Command or Cooling Valve Percent Command or Heating/Cooling Valve Position or Heating Cooling Valve Percent Command
  • Energy Hold Off Mode Status or Energy Hold Off Mode Command
  • Supply Fan Status or Supply Fan Command or Low Speed Command or Medium Speed Command or High Speed Command
FCU High Zone Temperature 8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Zone Air Temperature must be greater than the sum of the Zone Air Temperature Setpoint and the Zone Temperature Error for longer than the Minimum Fault Time Delay time
  • Effective Zone Temperature or Zone Temperature
  • Effective Cooling Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
  • Supply Fan Status or Supply Fan Command or Low Speed Command or Medium Speed Command or High Speed Command
FCU Insufficient Heating Capacity
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The difference between the Zone Air Temperature and the Zone Air Temperature Setpoint must be greater than the Zone Temperature Error for longer than the Minimum Fault Time Delay time
  3. All Heating Outputs must be greater than or equal to the Heating Maximum Position for greater than the Heating Maximum Delay time
  • Effective Zone Temperature or Zone Temperature
  • Effective Heating Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
  • (Heating Valve Position or Heating Valve Percent Command) and/or (Heating/Cooling Valve Position or Heating Cooling Valve Percent Command)
  • [Required with Heating/Cooling Valve only] Summer Winter Status or Summer Winter Command
  • Supply Fan Status or Supply Fan Command or Low Speed Command or Medium Speed Command or High Speed Command
FCU Low Zone Temperature 8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Zone Air Temperature must be less than the difference of the Zone Air Temperature Setpoint and the Zone Temperature Error for longer than the Minimum Fault Time Delay time
  • Effective Zone Temperature or Zone Temperature
  • Effective Heating Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
  • Supply Fan Status or Supply Fan Command or Low Speed Command or Medium Speed Command or High Speed Command
FCU Simultaneously Heating and Cooling
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Cooling Output must be greater than the Cooling Minimum Position for longer than the Minimum Fault Time Delay time
  3. The Heating Output must be greater than the Heating Minimum Position for longer than the Minimum Fault Time Delay time
  • Heating Valve Percent Command
  • Cooling Valve Percent Command
  • Supply Fan Status or Supply Fan Command or Low Speed Command or Medium Speed Command or High Speed Command
FCU Zone Temperature Cooling Setpoint is Too Low 8 This fault occurs any time that the Effective Cooling Temperature Setpoint is below the Zone Temperature Setpoint Minimum attribute.
  • Effective Cooling Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
FCU Zone Temperature Heating Setpoint is Too High 8 This fault occurs any time that the Effective Heating Temperature Setpoint is above the Zone Temperature Setpoint Maximum attribute.
  • Effective Heating Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
RTU Constantly Running This fault occurs any time that the Supply Fan is running for longer than the Equipment Excessive Runtime time. It is intended to identify systems which should be shutting down and not doing so. Disable this fault for any systems which must always run.
  • Supply Fan Status or Supply Fan Command
RTU High Discharge Air Temperature 8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Discharge Air Temperature must be greater than the sum of the Discharge Air Temperature Setpoint and the Discharge Air Temperature Error for longer than the Minimum Fault Time Delay time
  • Discharge Air Temperature
  • Effective Discharge Air Temperature Setpoint or Discharge Air Temperature Setpoint
  • Supply Fan Status or Supply Fan Command
RTU High Return Air Temperature 8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Return Air Temperature must be greater than the sum of the Return Air Temperature Setpoint and the Return Air Temperature Error for longer than the Minimum Fault Time Delay time
  • Return Air Temperature
  • Effective Cooling Temperature Setpoint or Return Air Temperature Setpoint
    Note: Return Air Temperature Setpoint must be present.
  • Supply Fan Status or Supply Fan Command
RTU High Zone Temperature 8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Zone Air Temperature must be greater than the sum of the Zone Air Temperature Setpoint and the Zone Temperature Error for longer than the Minimum Fault Time Delay time
  • Effective Zone Temperature or Zone Temperature
  • Effective Cooling Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
  • Supply Fan Status or Supply Fan Command
RTU Humidity Setpoint is Outside of Comfort Limits Any of the following criteria must be met in order for this fault to occur:
  1. The Humidification or Dehumidification Setpoint is above the Humidity Comfort Maximum attribute
  2. The Humidification or Dehumidification Setpoint is below the Humidity Comfort Minimum attribute
  • Humidity Setpoint and/or Dehumidification Setpoint
RTU Insufficient Heating Capacity
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Discharge Air Temperature must be less than the difference of the Discharge Air Temperature Setpoint and the Discharge Air Temperature Error for longer than the Minimum Fault Time Delay time
  3. The Heating Outputs must be greater than or equal to the Heating Maximum Position for greater than the Heating Maximum Delay time
  • Discharge Air Temperature
  • Effective Discharge Air Temperature Setpoint or Discharge Air Temperature Setpoint
  • Reheat Valve Position or Reheat Valve Percent Command
  • Supply Fan Status or Supply Fan Command
RTU Low Discharge Air Temperature 8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Discharge Air Temperature must be less than the difference of the Discharge Air Temperature Setpoint and the Discharge Air Temperature Error for longer than the Minimum Fault Time Delay time
  • Discharge Air Temperature
  • Effective Discharge Air Temperature Setpoint or Discharge Air Temperature Setpoint
  • Supply Fan Status or Supply Fan Command
RTU Low Return Air Temperature 8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Return Air Temperature must be less than the difference of the Return Air Temperature Setpoint and the Return Air Temperature Error for longer than the Minimum Fault Time Delay time
  • Return Air Temperature
  • Effective Heating Temperature Setpoint or Return Air Temperature Setpoint
    Note: Return Air Temperature Setpoint must be present.
  • Supply Fan Status or Supply Fan Command
RTU Low Zone Temperature 8
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Zone Air Temperature must be less than the difference of the Zone Air Temperature Setpoint and the Zone Temperature Error for longer than the Minimum Fault Time Delay time
  • Effective Zone Temperature or Zone Temperature
  • Effective Heating Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
  • Supply Fan Status or Supply Fan Command
RTU Mechanically Cooling without using Economizer
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Mixed Air Damper Output is less than the Damper Open Position for longer than the Minimum Fault Time Delay time
  3. The Cooling Output is greater than the Cooling Minimum Position for longer than the Minimum Fault Time Delay time
  4. The Outdoor Air Temperature is less than the Economizer Switchover Temperature for longer than the Minimum Fault Time Delay time
  • Outdoor Air Temperature
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Cooling Valve Position or Cooling Valve Percent Command
  • Supply Fan Status or Supply Fan Command
RTU Not Running when Occupied
  1. The system must be 'Occupied'
  2. The Supply Fan is not running for longer than the Equipment Excessive Downtime time.
  • Supply Fan Status or Supply Fan Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
RTU Return CO2 Level is Too High
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Return CO2 level exceeds the CO2 Level Maximum for longer than the Minimum Fault Time Delay time
  • Return Air CO2
  • Supply Fan Status or Supply Fan Command
RTU Return Humidity is Outside of Comfort Limits
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. Either condition below occurs for longer than the Minimum Fault Time Delay time:
    1. The Return Humidity exceeds the Humidity Comfort Maximum
    2. The Return Humidity drops below the Humidity Comfort Minimum
  • Return Air Humidity
  • Supply Fan Status or Supply Fan Command
RTU Return Temperature Cooling Setpoint is Too Low 8 This fault occurs any time that the Effective Cooling Temperature Setpoint is below the Return Temperature Setpoint Minimum attribute.
  • Effective Cooling Temperature Setpoint or Return Air Temperature Setpoint
    Note: Return Air Temperature Setpoint must be present.
RTU Return Temperature Heating Setpoint is Too High 8 This fault occurs any time that the Effective Heating Temperature Setpoint is above the Return Temperature Setpoint Maximum attribute.
  • Effective Heating Temperature Setpoint or Return Air Temperature Setpoint
    Note: Return Air Temperature Setpoint must be present.
RTU Zone CO2 Level is Too High
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. The Zone CO2 level exceeds the CO2 Level Maximum for longer than the Minimum Fault Time Delay time
  • Zone CO2
  • Supply Fan Status or Supply Fan Command
RTU Zone Humidity is Outside of Comfort Limits
  1. The Supply Fan must be running for a minimum of the Minimum Equipment Start Time Delay time
  2. Either condition below occurs for longer than the Minimum Fault Time Delay time
    1. The Zone Humidity exceeds the Humidity Comfort Maximum
    2. The Zone Humidity drops below the Humidity Comfort Minimum
  • Zone Humidity
  • Supply Fan Status or Supply Fan Command
RTU Zone Temperature Cooling Setpoint is Too Low 8 This fault occurs any time that the Effective Cooling Temperature Setpoint is below the Zone Temperature Setpoint Minimum attribute.
  • Effective Cooling Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
RTU Zone Temperature Heating Setpoint is Too High 8 This fault occurs any time that the Effective Heating Temperature Setpoint is above the Zone Temperature Setpoint Maximum attribute.
  • Effective Heating Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
VAV High Flow
  1. The system must be 'Occupied' for a minimum of the Minimum Occupied Time Delay time
  2. The Supply Air Flow must be greater than the Supply Air Flow Setpoint multiplied by one plus the Air Flow Error Setpoint Comparison divided by 100 for longer than the Minimum Fault Time Delay time
  3. The Supply Air Flow Error must be greater than the Air Flow Error Minimum
  • Discharge Air Flow
  • Discharge Air Flow Setpoint
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
VAV High Zone Temperature 8
  1. The system must be 'Occupied' for a minimum of the Minimum Occupied Time Delay time
  2. The Zone Air Temperature must be greater than the sum of the Zone Air Temperature Setpoint and the Zone Temperature Error for longer than the Minimum Fault Time Delay time
  • Zone Temperature
  • Effective Cooling Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint 9
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
VAV Insufficient Flow Capacity
  1. The system must be 'Occupied' for a minimum of the Minimum Occupied Time Delay time
  2. The Supply Air Flow must be less than the Supply Air Flow Setpoint multiplied by one minus the Air Flow Error Setpoint Comparison divided by 100 for longer than the Minimum Fault Time Delay time
  3. The Supply Air Flow Error must be greater than the Air Flow Error Minimum
  4. The Supply Air Damper is equal or greater than the Damper Open Position for greater than the Damper Open Delay time
  • Discharge Air Flow
  • Discharge Air Flow Setpoint
  • Supply Air Damper Position or Supply Air Damper Percent Command10
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
VAV Insufficient Heating Capacity
  1. The system must be 'Occupied' for a minimum of the Minimum Occupied Time Delay time
  2. The difference between the Zone Air Temperature and the Zone Air Temperature Setpoint must be greater than the Zone Temperature Error for longer than the Minimum Fault Time Delay time
  3. All Heating Outputs must be greater than or equal to the Heating Maximum Position for greater than the Heating Maximum Delay time
  • Zone Temperature
  • Effective Heating Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
  • Heating Valve Percent Command and/or Supplemental Heating Valve Percent Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
VAV Low Flow
  1. The system must be 'Occupied' for a minimum of the Minimum Occupied Time Delay time
  2. The Supply Air Flow must be less than the Supply Air Flow Setpoint multiplied by one minus the Air Flow Error Setpoint Comparison divided by 100 for longer than the Minimum Fault Time Delay time
  3. The Supply Air Flow Error must be greater than the Air Flow Error Minimum
  • Discharge Air Flow
  • Discharge Air Flow Setpoint
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
VAV Low Zone Temperature 8
  1. The system must be 'Occupied' for a minimum of the Minimum Occupied Time Delay time
  2. The Zone Air Temperature must be less than the difference of the Zone Air Temperature Setpoint and the Zone Temperature Error for longer than the Minimum Fault Time Delay time
  • Zone Temperature
  • Effective Heating Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
VAV Zone CO2 Level is Too High
  1. The system must be 'Occupied' for a minimum of the Minimum Occupied Time Delay time
  2. The Zone CO2 level exceeds the CO2 Level Maximum for longer than the Minimum Fault Time Delay time
  • Zone CO2
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
VAV Zone Humidity is Outside of Comfort Limits
  1. The system must be 'Occupied' for a minimum of the Minimum Occupied Time Delay time
  2. Either condition below occurs for longer than the Minimum Fault Time Delay time
    1. The Zone Humidity exceeds the Zone Humidity Comfort Maximum
    2. The Zone Humidity drops below the Zone Humidity Comfort Minimum
  • Zone Humidity
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
VAV Zone Temperature Cooling Setpoint is Too Low 8 This fault occurs any time that the Effective Cooling Temperature Setpoint is below the Zone Temperature Setpoint Minimum attribute.
  • Effective Cooling Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint
VAV Zone Temperature Heating Setpoint is Too High 8 This fault occurs any time that the Effective Heating Temperature Setpoint is above the Zone Temperature Setpoint Maximum attribute.
  • Effective Heating Temperature Setpoint or Local Zone Temperature Setpoint or (Network Zone Temperature Setpoint + Zone Warm Cool Adjust Setpoint) or Network Zone Temperature Setpoint

You can see these fault rules and their descriptions in the Fault Manager, when you click on an individual fault rule; and in the Charting section in the upper right of the Fault Triage window.

Note: There are no custom rules at Metasys UI Release 5.0.

What equipment can return a fault?

There are 64 faults in total. 10 of these faults are returned by Variable Air Volume boxes (VAVs), eight are returned by Fan Coil Units (FCUs), 19 are returned by Roof Top Units (RTU), and 28 are returned by Air Handling Units (AHU). The following table outlines the fault types and the pieces of equipment that return the respective faults in more detail.
Table 10. Fault type by equipment
General fault type VAV FCU RTU AHU
Mixed Air Dampers are Stuck Open
Insufficient Heating Capacity
Not Running when Occupied
Mixed Air Dampers are Stuck Closed
High Supply Pressure
Insufficient Fan Capacity
Zone CO2 Level is Too High
Low Supply Pressure
Low Discharge Air Temperature
High Discharge Air Temperature
Building Static Pressure is Too Low
Building Static Pressure is Too High
Outdoor Air Minimum Flow is Too Low
Return CO2 Level is Too High
Low Return Air Temperature
Low Zone Temperature
High Return Air Temperature
High Zone Temperature
Return Temperature Heating Setpoint is Too High
Return Temperature Cooling Setpoint is Too Low
Humidity Setpoint Outside of Comfort Limits
Outdoor Air Minimum Flow is Too High
Zone Humidity is Outside of Comfort Limits
Return Humidity is Outside of Comfort Limits
Zone Temperature Heating Setpoint is Too High
Zone Temperature Cooling Setpoint is Too Low
Insufficient Flow Capacity
High Flow
Low Flow
Mechanically Cooling without using Economizer
Constantly Running
Simultaneously Heating and Cooling
Heating or Cooling While a Window is Open
A Window is Open While Unoccupied
Number of faults for each equipment type 10 8 19 28

What information is provided in the Fault Triage trend charts for each fault?

The trend chart displayed in the Charting section of the Fault Triage window consists of three stacked charts. Generally, the top chart contains process variables and setpoints, the second chart contains outputs, and the third chart contains status or state information.
Table 11. Fault rules and semantic point model for trend charts
Fault rule Top chart Middle chart Bottom chart
AHU Building Static Pressure is Too High
  • Building Static Pressure
  • Building Static Pressure Setpoint
  • Return Fan Percent Command
  • Supply Fan Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Exhaust Air Damper Position or Exhaust Air Damper Percent Command
  • Return Fan Status or Return Fan Command
  • Supply Fan Status or Supply Fan Command
  • Exhaust Fan Status or Exhaust Fan Command
  • Relief Fan Status or Relief Fan Command
  • Attribute: In_Fault_Time11
AHU Building Static Pressure is Too Low
  • Building Static Pressure
  • Building Static Pressure Setpoint
  • Return Fan Percent Command
  • Supply Fan Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Exhaust Air Damper Position or Exhaust Air Damper Percent Command
  • Return Fan Status or Return Fan Command
  • Supply Fan Status or Supply Fan Command
  • Exhaust Fan Status or Exhaust Fan Command
  • Relief Fan Status or Relief Fan Command
  • Attribute: In_Fault_Time11
AHU Constantly Running not applicable not applicable
  • Supply Fan Status or Supply Fan Command
AHU High Discharge Air Temperature
  • Discharge Air Temperature
  • Outdoor Air Temperature
  • Effective Discharge Air Temperature Setpoint or Discharge Air Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Minimum Outdoor Air Damper Position or Minimum Outdoor Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Preheat Valve Position or Preheat Valve Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Preheat Stage Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
AHU High Return Air Temperature
  • Return Air Temperature
  • Outdoor Air Temperature
  • Effective Cooling Temperature Setpoint or Return Air Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Minimum Outdoor Air Damper Position or Minimum Outdoor Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Preheat Valve Position or Preheat Valve Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Preheat Stage Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
AHU High Supply Pressure
  • Effective Discharge Air Static Pressure or Discharge Air Static Pressure
  • Discharge Air Static Pressure Setpoint
  • Supply Fan Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Minimum Outdoor Air Damper Position or Minimum Outdoor Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Exhaust Air Damper Position or Exhaust Air Damper Percent Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
AHU High Zone Temperature
  • Zone Temperature or Effective Zone Temperature
  • Effective Cooling Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Minimum Outdoor Air Damper Position or Minimum Outdoor Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Preheat Valve Position or Preheat Valve Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Preheat Stage Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
AHU Humidity Setpoint is Outside of Comfort Limits
  • Humidity Setpoint
  • Dehumidification Setpoint
 not applicable not applicable
AHU Insufficient Fan Capacity
  • Effective Discharge Air Static Pressure or Discharge Air Static Pressure (Lowest)
  • Discharge Air Static Pressure Setpoint
  • Supply Fan Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Minimum Outdoor Air Damper Position or Minimum Outdoor Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Exhaust Air Damper Position or Exhaust Air Damper Percent Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
AHU Insufficient Heating Capacity
  • Discharge Air Temperature
  • Outdoor Air Temperature
  • Effective Discharge Air Temperature Setpoint or Discharge Air Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Minimum Outdoor Air Damper Position or Minimum Outdoor Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Preheat Valve Position or Preheat Valve Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Preheat Stage Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
AHU Low Discharge Air Temperature
  • Discharge Air Temperature
  • Outdoor Air Temperature
  • Effective Discharge Air Temperature Setpoint or Discharge Air Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Minimum Outdoor Air Damper Position or Minimum Outdoor Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Preheat Valve Position or Preheat Valve Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Preheat Stage Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
AHU Low Return Air Temperature
  • Return Air Temperature
  • Outdoor Air Temperature
  • Effective Heating Temperature Setpoint or Return Air Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Minimum Outdoor Air Damper Position or Minimum Outdoor Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Preheat Valve Position or Preheat Valve Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Preheat Stage Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
AHU Low Supply Pressure
  • Effective Discharge Air Static Pressure or Discharge Air Static Pressure
  • Discharge Air Static Pressure Setpoint
  • Supply Fan Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Minimum Outdoor Air Damper Position or Minimum Outdoor Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Exhaust Air Damper Position or Exhaust Air Damper Percent Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
AHU Low Zone Temperature
  • Zone Temperature or Effective Zone Temperature
  • Effective Heating Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Minimum Outdoor Air Damper Position or Minimum Outdoor Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Preheat Valve Position or Preheat Valve Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Preheat Stage Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
AHU Mechanically Cooling without using Economizer
  • Outdoor Air Temperature
  • Switchover Setpoint Parameter
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Cooling Valve Position or Cooling Valve Percent Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
AHU Mixed Air Dampers are Stuck Closed
  • Return Air Temperature
  • Mixed Air Temperature
  • Outdoor Air Temperature
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Preheat Valve Position or Preheat Valve Percent Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
AHU Mixed Air Dampers are Stuck Open
  • Return Air Temperature
  • Mixed Air Temperature
  • Outdoor Air Temperature
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Preheat Valve Position or Preheat Valve Percent Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
AHU Not Running when Occupied not applicable not applicable
  • Supply Fan Status or Supply Fan Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
AHU Outdoor Air Minimum Flow is Too High
  • Outdoor Air Flow
  • Minimum Outdoor Air Flow
  • Outdoor Air Minimum Flow Setpoint
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Minimum Outdoor Air Damper Position or Minimum Outdoor Air Damper Percent Command
  • Supply Fan Percent Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Minimum Outdoor Air Damper Status
  • Minimum Outdoor Air Fan Status
  • Attribute: In_Fault_Time11
AHU Outdoor Air Minimum Flow is Too Low
  • Outdoor Air Flow
  • Minimum Outdoor Air Flow
  • Outdoor Air Minimum Flow Setpoint
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Minimum Outdoor Air Damper Position or Minimum Outdoor Air Damper Percent Command
  • Supply Fan Percent Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Minimum Outdoor Air Damper Status
  • Minimum Outdoor Air Fan Status
  • Attribute: In_Fault_Time11
AHU Return CO2 Level is Too High
  • Return Air CO2
  • Outdoor Air Flow
  • Minimum Outdoor Air Flow
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Exhaust Air Damper Position or Exhaust Air Damper Percent Command
  • Supply Fan Percent Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
AHU Return Humidity is Outside of Comfort Limits
  • Return Air Humidity
  • Humidity Setpoint
  • Dehumidification Setpoint
  • Humidifier Percent Command
  • Cooling Valve Position or Cooling Valve Percent Command
  • Humidifier Enable Command
  • Humidifier Status
  • Humidifier Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
AHU Return Temperature Cooling Setpoint is Too Low
  • Return Air Temperature Setpoint
  • Effective Cooling Temperature Setpoint
 not applicable
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
AHU Return Temperature Heating Setpoint is Too High
  • Return Air Temperature Setpoint
  • Effective Heating Temperature Setpoint
 not applicable
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
AHU Zone CO2 Level is Too High
  • Zone CO2
  • Outdoor Air Flow
  • Minimum Outdoor Air Flow
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Outdoor Air Damper Position or Outdoor Air Damper Percent Command
  • Return Air Damper Position or Return Air Damper Percent Command
  • Exhaust Air Damper Position or Exhaust Air Damper Percent Command
  • Supply Fan Percent Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
AHU Zone Humidity is Outside of Comfort Limits
  • Zone Humidity
  • Humidity Setpoint
  • Dehumidification Setpoint
  • Humidifier Percent Command
  • Cooling Valve Position or Cooling Valve Percent Command
  • Humidifier Enable Command
  • Humidifier Status
  • Humidifier Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
AHU Zone Temperature Cooling Setpoint is Too Low
  • Effective Cooling Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
 not applicable
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
AHU Zone Temperature Heating Setpoint is Too High
  • Effective Heating Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
 not applicable
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
FCU A Window is Open While Unoccupied not applicable not applicable
  • Energy Hold Off Mode Status or Energy Hold Off Mode Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
  • Attribute: In_Fault_Time11
FCU Heating or Cooling While a Window is Open not applicable
  • Heating Valve Percent Command
  • Cooling Valve Percent Command
  • Heating/Cooling Valve Position or Heating Cooling Valve Percent Command
  • Reheat Stage Command
  • Heating Valve Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Energy Hold Off Mode Status or Energy Hold Off Mode Command
  • Summer Winter Status or Summer Winter Command
  • Supply Fan Status or Supply Fan Command or Low Speed Command or Medium Speed Command or High Speed Command
  • Attribute: In_Fault_Time11
FCU High Zone Temperature
  • Zone Temperature or Effective Zone Temperature
  • Effective Cooling Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
  • Heating Valve Position or Heating Valve Percent Command
  • Cooling Valve Position or Cooling Valve Percent Command
  • Heating/Cooling Valve Position or Heating Cooling Valve Percent Command
  • Reheat Stage Command
  • Heating Valve Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Energy Hold Off Mode Status or Energy Hold Off Mode Command
  • Summer Winter Status or Summer Winter Command
  • Supply Fan Status or Supply Fan Command or Low Speed Command or Medium Speed Command or High Speed Command
  • Attribute: In_Fault_Time11
FCU Insufficient Heating Capacity
  • Zone Temperature
  • Effective Heating Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
  • Heating Valve Position or Heating Valve Percent Command
  • Heating/Cooling Valve Position or Heating Cooling Valve Percent Command
  • Cooling Valve Position or Cooling Valve Percent Command
  • Reheat Stage Command
  • Heating Valve Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Energy Hold Off Mode Status or Energy Hold Off Mode Command
  • Summer Winter Status or Summer Winter Command
  • Supply Fan Status or Supply Fan Command or Low Speed Command or Medium Speed Command or High Speed Command
  • Attribute: In_Fault_Time11
FCU Low Zone Temperature
  • Zone Temperature or Effective Zone Temperature
  • Effective Heating Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
  • Heating Valve Position or Heating Valve Percent Command
  • Cooling Valve Position or Cooling Valve Percent Command
  • Heating/Cooling Valve Position or Heating Cooling Valve Percent Command
  • Reheat Stage Command
  • Heating Valve Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Energy Hold Off Mode Status or Energy Hold Off Mode Command
  • Summer Winter Status or Summer Winter Command
  • Supply Fan Status or Supply Fan Command or Low Speed Command or Medium Speed Command or High Speed Command
  • Attribute: In_Fault_Time11
FCU Simultaneously Heating and Cooling not applicable
  • Heating Valve Percent Command
  • Cooling Valve Percent Command
  • Reheat Stage Command
  • Heating Valve Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Supply Fan Status or Supply Fan Command or Low Speed Command or Medium Speed Command or High Speed Command
  • Attribute: In_Fault_Time11
FCU Zone Temperature Cooling Setpoint is Too Low
  • Effective Cooling Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
 not applicable
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
FCU Zone Temperature Heating Setpoint is Too High
  • Effective Heating Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
 not applicable
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
RTU Constantly Running not applicable not applicable
  • Supply Fan Status or Supply Fan Command
RTU High Discharge Air Temperature
  • Discharge Air Temperature
  • Outdoor Air Temperature
  • Effective Discharge Air Temperature Setpoint or Discharge Air Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
RTU High Return Air Temperature
  • Return Air Temperature
  • Outdoor Air Temperature
  • Effective Cooling Temperature Setpoint or Return Air Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
RTU High Zone Temperature
  • Zone Temperature or Effective Zone Temperature
  • Effective Cooling Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
RTU Humidity Setpoint is Outside of Comfort Limits
  • Humidity Setpoint
  • Dehumidification Setpoint
 not applicable not applicable
RTU Insufficient Heating Capacity
  • Discharge Air Temperature
  • Outdoor Air Temperature
  • Effective Discharge Air Temperature Setpoint or Discharge Air Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
RTU Low Discharge Air Temperature
  • Discharge Air Temperature
  • Outdoor Air Temperature
  • Effective Discharge Air Temperature Setpoint or Discharge Air Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
RTU Low Return Air Temperature
  • Return Air Temperature
  • Outdoor Air Temperature
  • Effective Heating Temperature Setpoint or Return Air Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
RTU Low Zone Temperature
  • Zone Temperature or Effective Zone Temperature
  • Effective Heating Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
  • Cooling Valve Position or Cooling Valve Percent Command
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Reheat Valve Position or Reheat Valve Percent Command
  • Cooling Stage Command
  • Cooling Valve Command
  • Reheat Stage Command
  • Supply Fan Status or Supply Fan Command
  • AHU Temperature Control State
  • Attribute: In_Fault_Time11
RTU Mechanically Cooling without using Economizer
  • Outdoor Air Temperature
  • Switchover Setpoint Parameter
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Cooling Valve Position or Cooling Valve Percent Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
RTU Not Running when Occupied not applicable not applicable
  • Supply Fan Status or Supply Fan Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
RTU Return CO2 Level is Too High
  • Return Air CO2
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Supply Fan Percent Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
RTU Return Humidity is Outside of Comfort Limits
  • Return Air Humidity
  • Humidity Setpoint
  • Dehumidification Setpoint
  • Humidifier Percent Command
  • Cooling Valve Position or Cooling Valve Percent Command
  • Humidifier Enable Command
  • Humidifier Status
  • Humidifier Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time
RTU Return Temperature Cooling Setpoint is Too Low
  • Return Air Temperature Setpoint
  • Effective Cooling Temperature Setpoint
 not applicable
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
RTU Return Temperature Heating Setpoint is Too High
  • Return Air Temperature Setpoint
  • Effective Heating Temperature Setpoint
 not applicable
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
RTU Zone CO2 Level is Too High
  • Zone CO2
  • Mixed Air Damper Position or Mixed Air Damper Percent Command
  • Supply Fan Percent Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
RTU Zone Humidity is Outside of Comfort Limits
  • Zone Humidity
  • Humidity Setpoint
  • Dehumidification Setpoint
  • Humidifier Percent Command
  • Cooling Valve Position or Cooling Valve Percent Command
  • Humidifier Enable Command
  • Humidifier Status
  • Humidifier Command
  • Supply Fan Status or Supply Fan Command
  • Attribute: In_Fault_Time11
RTU Zone Temperature Cooling Setpoint is Too Low
  • Effective Cooling Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
 not applicable
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
RTU Zone Temperature Heating Setpoint is Too High
  • Effective Heating Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
 not applicable
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
VAV High Flow
  • Discharge Air Flow
  • Discharge Air Flow Setpoint
  • Supply Air Damper Position
  • Supply Air Damper Percent Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
  • Supply Fan Command
  • Attribute: In_Fault_Time11
VAV High Zone Temperature
  • Zone Temperature
  • Effective Cooling Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
  • Heating Valve Percent Command
  • Supplemental Heating Valve Percent Command
  • Cooling Valve Percent Command
  • Supply Air Damper Position
  • Supply Air Damper Percent Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
  • Reheat Stage Command
  • Supplemental Heating Stage Command
  • Heating Valve Command
  • Supply Fan Command
  • Attribute: In_Fault_Time11
VAV Insufficient Flow Capacity
  • Discharge Air Flow
  • Discharge Air Flow Setpoint
  • Supply Air Damper Position
  • Supply Air Damper Percent Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
  • Supply Fan Command
  • Attribute: In_Fault_Time11
VAV Insufficient Heating Capacity
  • Zone Temperature
  • Effective Heating Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
  • Heating Valve Percent Command
  • Supplemental Heating Valve Percent Command
  • Cooling Valve Percent Command
  • Supply Air Damper Position
  • Supply Air Damper Percent Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
  • Reheat Stage Command
  • Supplemental Heating Stage Command
  • Heating Valve Command
  • Supply Fan Command
  • Attribute: In_Fault_Time11
VAV Low Flow
  • Discharge Air Flow
  • Discharge Air Flow Setpoint
  • Supply Air Damper Position
  • Supply Air Damper Percent Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
  • Supply Fan Command
  • Attribute: In_Fault_Time11
VAV Low Zone Temperature
  • Zone Temperature
  • Effective Heating Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
  • Heating Valve Percent Command
  • Supplemental Heating Valve Percent Command
  • Cooling Valve Percent Command
  • Supply Air Damper Position
  • Supply Air Damper Percent Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
  • Reheat Stage Command
  • Supplemental Heating Stage Command
  • Heating Valve Command
  • Supply Fan Command
  • Attribute: In_Fault_Time11
VAV Zone CO2 Level is Too High
  • Zone CO2
  • Minimum Flow CO2 Setpoint
  • Discharge Air Flow Setpoint
  • Supply Air Damper Position
  • Supply Air Damper Percent Command
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
  • Supply Fan Command
  • Attribute: In_Fault_Time11
VAV Zone Humidity is Outside of Comfort Limits
  • Zone Humidity
 not applicable
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
  • Energy Hold Off Mode Status
  • Attribute: In_Fault_Time11
VAV Zone Temperature Cooling Setpoint is Too Low
  • Effective Cooling Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
 not applicable
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status
VAV Zone Temperature Heating Setpoint is Too High
  • Effective Heating Temperature Setpoint
  • Local Zone Temperature Setpoint
  • Network Zone Temperature Setpoint
 not applicable
  • Effective Occupancy State or Occupancy Override Command or Occupancy Schedule or Occupancy Status

How does Fault Triage charting differ from Trends or from a Trend Study?

The difference between Fault Triage charting and trend extensions or trend studies relates to binning and the frequency of the fault generation. While trend extensions and trend studies are exact, the Fault Triage charts data points have a certain tolerance of +/- five minutes. This is mainly due to binning. Sample data for faults are binned in five minute intervals. Fault start and end intervals only occur every 15 minutes on the hour. Utilize trend extensions and trend studies for greater accuracy if needed.

Note: Trend extensions are not required to report faults. The charts in Fault Triage are auto-generated. However, the feature uses trend data to report faults if trend extensions exist. Trend sample data is also binned for use in determining faults.

How is the data required for fault evaluation acquired?

Fault evaluation is based on polling, as trend extensions are not required. After polling, the data is binned in five minute bins.

How is the data required for Fault Manager stored?

The Metasys Value database stores a running seven days’ worth of point values and statuses.

How frequently is data evaluated for faults? How frequently are faults created?

This occurs every 60 minutes on the hour. Faults are created based on a 15 minute interval.

Is the Fault Manager supported on all devices?

No, the Fault Manager is only supported on desktop and tablets.

1 This row applies to an OAS. You require a license to see the Potential Problem Areas Points on an OAS, but not on any other Metasys server.
2 In this scenario, you can see no tabs. Only the Faults are shown in the widget.
3 Fault Severity only.
4 Rank - which is derived by utilizing Fault Severity, Fault Occurrence, and Fault Duration.
5 Licensed on an OAS. You do not have to license the Potential Problem Areas Points on any other Metasys server.
6 In this scenario, you can see no tabs. Only the Points are shown in the widget.
7 The references in bold in this column are global attributes. Open the Fault Manager and click the GLOBAL ATTRIBUTES button in the upper-right corner to see a list of all global attributes.
8 The system only runs one set of temperature faults (high and low) against a piece of equipment. The running order is Discharge, Return, and finally Zone. The selection method is based on identifying a matching setpoint. For example, if the system does not see a Discharge Air Temperature Setpoint, but does see a Return Air Temperature Setpoint, then it will not run the Discharge Air or Zone Air Faults and use the Return Air faults.
9 The effective values are preferable, but if they are not available you can use Local Zone Temperature Setpoint, Network Zone Temperature Setpoint and Zone Warm Cool Adjust Setpoint and finally just Network Zone Temperature Setpoint.
10 Supply Air Damper Position is preferable, but Supply Air Damper Percent Command is the next best option.
11 All charts are shaded in red for the duration of that fault occurrence.