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INSTALLATION, OPERATION & MAINTENANCE MANUAL 717.814.5365
U-ERV/U-HRV
FAULT LIST
SERVICE &
MAINTENANCE
When the system enters a fault condition, one of the below faults will be displayed on all HMIs.
Depending on the type of fault, the system may:
1.
Require a manual reset
2.
Disable certain features from activating/operating or,
3.
Be disabled until corrective action is taken
Fault
Description
Reset Type
Supply Fan Proving
Supply fan RPM feedback is lower than expected
Automatic
Exhaust Fan Proving
Exhaust fan RPM feedback is lower than expected
Automatic
Bypass Damper Motor
Fault
The damper motor overcurrent protection has triggered a fault
Automatic
Bypass Damper Jammed
When economizer or defrost is enabled and the bypass damper has jammed,
this fault will be displayed until the obstruction is cleared
Automatic
Freezestat
When the supply air temperature has dropped below the freezestat set point
for a continuously defined period, the freezestat fault will activate
Manual
CO2 PPM Out of Range
The indicated CO2 value has remained significantly above the setpoint for
more than 10 minutes
Automatic
Temp/RH Sensors
Missing
The temp/RH sensors are not enabled when they should be. Verify
configuration settings are properly set
Automatic
Unit 1 Comm Error
A communication error to the supply fan, exhaust fan, temp/RH sensors, or
secondary controller has occurred in unit 1
Automatic
Unit 2 Comm Error
A communication error to the supply fan, exhaust fan, temp/RH sensors, or
secondary controller has occurred in unit 2
Automatic
Unit 3 Comm Error
A communication error to the supply fan, exhaust fan, temp/RH sensors, or
secondary controller has occurred in unit 3
Automatic
Unit 4 Comm Error
A communication error to the supply fan, exhaust fan, temp/RH sensors, or
secondary controller has occurred in unit 4
Automatic
Unit 5 Comm Error
A communication error to the supply fan, exhaust fan, temp/RH sensors, or
secondary controller has occurred in unit 5
Automatic
Unit 6 Comm Error
A communication error to the supply fan, exhaust fan, temp/RH sensors, or
secondary controller has occurred in unit 6
Automatic
Unit 7 Comm Error
A communication error to the supply fan, exhaust fan, temp/RH sensors, or
secondary controller has occurred in unit 7
Automatic
Unit 8 Comm Error
A communication error to the supply fan, exhaust fan, temp/RH sensors, or
secondary controller has occurred in unit 8
Automatic
Unit 9 Comm Error
A communication error to the supply fan, exhaust fan, temp/RH sensors, or
secondary controller has occurred in unit 9
Automatic
Unit 10 Comm Error
A communication error to the supply fan, exhaust fan, temp/RH sensors, or
secondary controller has occurred in unit 10
Automatic
Too Many Mem Writings
Internal controller error. Reach out to sales for assistance
Automatic
Retain Mem Write Error
Automatic
Содержание U-ERV 1200
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