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Table 17 — PIC 5 Alarm Codes (cont)
ALARM
CODE
(ALARMRST)
ALARM TEXT
DESCRIPTION
RESET TYPE
ACTION TAKEN
BY CONTROL
POSSIBLE CAUSE
INTEGRATED STARTER MODULE ALARMS (CONT)
Alm-442
ALM-442 VFD Fault —
Stop Fault
Manual
Unit shuts down.
Check Inverter Power Unit
VFD Circuit Board malfunction.
Call Carrier Service.
Alm-443
ALM-443 VFD Fault —
Rectifier Overtemp
Manual
Unit shuts down.
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 opera-
tion and blockage.
Alm-444
ALM-444 VFD Fault —
Inverter Overtemp
Manual
Unit shuts down.
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 opera-
tion and blockage.
Alm-445
ALM-445 VFD Fault —
Motor Current Imbalance
Manual
Unit shuts down.
Check Motor Current Imbalance% in
CFGUMVFD screen.
Alm-446
ALM-446 VFD Fault —
Line Voltage Imbalance
Manual
Unit shuts down.
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
Manual
Unit shuts down.
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
Manual
Unit shuts down.
Check VFD communication wiring and
connectors.
Check status lights on DPI Communica-
tions Interface Board.
Call Carrier Service.
Alm-449
ALM-449 VFD Fault —
VFD Fault
Manual
Unit shuts down.
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
Manual
Unit shuts down.
The VFD Start Inhibit is derived from the
Alarm bit being set in the VFD. The con-
ditions causing the alarm must be cor-
rected in the VFD to enable subsequent
starts and operation.
Alm-451
ALM-451 VFD Fault —
VFD Checksum Error
Manual
Unit shuts down.
Press Reset to Restore Configuration.
Actual VFD checksum does not match
calculated value.
Alm-452
ALM-452 VFD Fault —
Inductor Overtemp Switch
Manual
Unit shuts down.
Check Temp Switch and Cooling Fans.
Check for cooling fan air flow obstructions.
Alm-453
ALM-453 VFD Fault —
Incompatibility Fault
Manual
Unit shuts down.
Load compatible version files into drive.