Carrier PIC 5+ - Page 43

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Alm-435 ALM-435 VFD Fault - Rectier
Power Fault
As above As above Check VFD Status
Malfunction within VFD Power Module.
Call Carrier Service.
Alm-436 ALM-436 VFD Fault - Inverter
Power Fault
As above As above Check VFD Status
Malfunction within VFD Power Module.
Call Carrier Service.
Alm-437 ALM-437 VFD Fault - Rectier
Overcurrent
As above As above Check VFD Status
Check for high water temperatures or changes in water ow rates.
Alm-438 ALM-438 VFD Fault - Inverter
Overcurrent
As above As above
Check VFD Status
Check for high entering water temperature or low condenser water ow.
Check current settings in CFGUMVFD screen.
Alm-439 ALM-439 VFD Fault -
Condenser High Pressure
As above As above Check Compressor Discharge High Pressure switch wiring and
accuracy.
Check for high condenser water temperatures, low water ow, fouled
tubes.
Check for division plate/gasket bypass.
Check for noncondensables in refrigerant.
Alm-440 ALM-440 VFD Fault - Motor
Amps Not Sensed
As above As above Check main circuit breaker for trip.
Increase Current % Imbalance in CFGUMVFD screen.
Alm-441 ALM-441 VFD Fault - Motor
Acceleration Fault
As above As above Check that inlet guide vanes are fully closed at start-up.
Check Motor Rated Load Amps in CFGUMVFD screen.
Reduce unit pressure if possible.
Alm-442 ALM-442 VFD Fault - Stop Fault As above As above Check Inverter Power Unit
VFD Circuit Board malfunction.
Call Carrier Service.
Alm-443 ALM-443 VFD Fault - Rectier
Overtemp
As above As above Check Cooling and VFD Cong.
Check that VFD refrigerant isolation valves are open.
Check VFD refrigerant cooling solenoid and refrigerant strainer.
Check for proper VFD cooling fan operation and blockage.
Alm-444 ALM-444 VFD Fault - Inverter
Overtemp
As above As above Check Cooling and VFD Cong.
Check that VFD refrigerant isolation valves are open.
Check VFD refrigerant cooling solenoid and refrigerant strainer.
Check for proper VFD cooling fan operation and blockage.
Alm-445 ALM-445 VFD Fault - Motor
Current Imbalance
As above As above Check Motor Current Imbalance% in CFGUMVFD screen.
Alm-446 ALM-446 VFD Fault - Line
Voltage Imbalance
As above As above Check phase-to-phase and phase-to-ground distribution bus voltage.
Increase Line Voltage Imbalance% in CFGUMVFD screen.
Alm-447 ALM-447 VFD Fault - Frequency
Fault
As above As above Check Power Supply
If operating from a generator, check generator size and speed.
Check utility power supply.
Alm-448 ALM-448 VFD Fault - VFD
Comm Fail
As above As above Check VFD communication wiring and connectors.
Check status lights on DPI Communications Interface Board.
Call Carrier Service.
Alm-449 ALM-449 VFD Fault - VFD Fault As above As above Check fault code and possible cause in corresponding type of VFD
user manuals
Call Carrier Service
Alm-450 ALM-450 VFD Fault - VFD Start
Inhibit
As above As above
The VFD Start Inhibit is derived from the Alarm bit being set in the VFD.
The conditions causing the alarm must be corrected in the VFD to
enable subsequent starts and operation
Alm-451 ALM-451 VFD Fault - VFD
Checksum Error
As above As above Press Reset to Restore Conguration.
Actual VFD checksum does not match calculated value.
Alm-452 ALM-452 VFD Fault - Inductor
Overtemp Switch
As above As above Check Temp Switch and Cooling Fans.
Check for cooling fan air ow obstructions
Alm-453 ALM-453 VFD Fault -
Incompatibility Fault
As above As above Load compatible version les into drive
* Alarm code in ALARMRST table