PoolPak MPK series - Page 75

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PoolPak
®
MPK Series IOM
Check aux air heating system.
Check for stuck outside air damper.
If SplyTemp sensor failure also shown, check supply air temp sensor.
FireTrip = Fire Trip active
Check for signal from building fire and smoke control system.
Verify that the input is correctly configured for active on open or close.
SmkPurge = Smoke Purge active
Check for signal from fireman’s switch or fire control system.
Verify that the input is correctly configured for active on open or close.
SFanOff = Supply Fan is off
The controller is asking the supply fan to run, but it is not.
Check to be sure the supply fan VFD is in AUTO mode. (D cab only)
Check for fault messages on the supply VFD display.(D cab only)
Check to be sure the supply fan digital output is not forced to OFF.
Check to be sure the supply fan speed analog output is not forced to zero (0).
EFanOff = Exhaust Fan is off
The controller is asking the exhaust fan to run, but it is not.
Check to be sure the exhaust fan VFD is in AUTO mode. (D cab only)
Check for fault messages on the exhaust VFD display.(D cab only)
Check to be sure the exhaust fan digital output is not forced to OFF.
Check to be sure the exhaust fan speed analog output is not forced to zero (0).
PFanOff = Purge Fan is off
The controller is asking the purge fan to run, but it is not.
Check to be sure the purge fan VFD is in AUTO mode. (D cab only)
Check for fault messages on the purge VFD display.(D cab only)
Check to be sure the purge fan digital output is not forced to OFF.
Check to be sure the purge fan speed analog output is not forced to zero (0).
EFanFail = Exhaust Fan failure (same as for SFanFail, PFanFail)
The fan VFD or EC motor is indicating a fault condition.
Some Possible FanVFD Faults as displayed on VFD display (D cabinet models only):
1. Overcurrent – Output current exceeded the limits of the VFD.
Check to be sure that backdraft damper can open freely.
Check to be sure motor shaft can spin freely.
2. DC Overvolt – DC bus voltage in VFD is too high.
Check for high incoming line voltage. Must be in range shown on dataplate.
Check to be sure that the VFD is configured to allow the motor to coast to stop
3. Dev Overtemp – VFD internal temperature is too high.
Check to be sure heatsink fan can spin freely.
Check to be sure the heatsink is free of dust and debris.
4. Short Circuit – The VFD has identified a short in the motor or wiring.
Check for shorted motor windings.
Check for a short in the wiring between the VFD and the motor.
5. DC Undervolt – DC bus voltage in VFD is too low.
Check for low incoming line voltage. Must be in range shown on dataplate.