Commissioning Instructions

Step 8 – Fault detection and diagnostics parameters
A6V12035398
Unrestricted
14
Step 8 – Fault detection and diagnostics
parameters
This step covers the addition and configuration of paramaters for:
• Supply flow fault and diagnostics
• Supply heat temp fault and diagnostics
• Extract flow fault and diagnostics
• Dual Duct flow fault and diagnostics
To add additional parameters to the Default values, left click on button in
the upper right of the Configuration Tab screen. Select %RSegm%’AuxFnct
Add the following to “Additional parameters” as needed:
NRCA-MCH13A (Revised 6/17) section C (Functional Testing for Zone Terminal Units)
contains 7 steps/tests which in can result in 3 possible BACnet Point alarm/fault.
Please note that steps 1-6 result in a fault being reported via one of the 3 possible
BACnet Point faults. Step 7 tests functionality and will not result in a fault alarm.
Step
Test
BACnet Point Name
BACnet Obj
1
Sensor Drift/failure
SuAirFlFlt
SU FLOW FLT
2
Damper/Actuator fault – damper stuck open
SuAirFlFlt
SU FLOW FLT
3
Damper/Actuator fault – damper stuck closed
SuAirFlFlt
SU FLOW FLT
4
Valve/Actuator fault (for system with HW reheat)
HTSuFlt
SU H TMP FLT
5
Feedback loop tuning fault (unstable airflow)
SuUnstblCtlFlt
SU UNSTB FLT
6
Disconnected inlet duct
SuAirFlFlt
SU FLOW FLT
7
Discharge air temp sensor
NA – Functionality Test