Carrier PIC 5+ User Manual page 43

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