Carrier AquaEdge 19XR Controls Operation And Troubleshooting page 45
Two-stage high-efficiency semi-hermetic centrifugal liquid chillers with pic 5 controls
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ALARM
ALARM TEXT
CODE
DESCRIPTION
(ALARMRST)
ALM-442 VFD Fault —
Alm-442
Stop Fault
ALM-443 VFD Fault —
Alm-443
Rectifier Overtemp
ALM-444 VFD Fault —
Alm-444
Inverter Overtemp
ALM-445 VFD Fault —
Alm-445
Motor Current Imbalance
ALM-446 VFD Fault —
Alm-446
Line Voltage Imbalance
ALM-447 VFD Fault —
Alm-447
Frequency Fault
ALM-448 VFD Fault —
Alm-448
VFD Comm Fail
ALM-449 VFD Fault —
Alm-449
VFD Fault
ALM-450 VFD Fault —
Alm-450
VFD Start Inhibit
ALM-451 VFD Fault —
Alm-451
VFD Checksum Error
ALM-452 VFD Fault —
Alm-452
Inductor Overtemp Switch
ALM-453 VFD Fault —
Alm-453
Incompatibility Fault
Table 17 — PIC 5 Alarm Codes (cont)
RESET TYPE
INTEGRATED STARTER MODULE ALARMS (CONT)
Manual
Manual
Manual
Manual
Manual
Manual
Manual
Manual
Manual
Manual
Manual
Manual
45
ACTION TAKEN
POSSIBLE CAUSE
BY CONTROL
Check Inverter Power Unit
Unit shuts down.
VFD Circuit Board malfunction.
Call Carrier Service.
Check Cooling and VFD Config.
Check that VFD refrigerant isolation
valves are open.
Unit shuts down.
Check VFD refrigerant cooling solenoid
and refrigerant strainer.
Check for proper VFD cooling fan opera-
tion and blockage.
Check Cooling and VFD Config.
Check that VFD refrigerant isolation
valves are open.
Unit shuts down.
Check VFD refrigerant cooling solenoid
and refrigerant strainer.
Check for proper VFD cooling fan opera-
tion and blockage.
Check Motor Current Imbalance% in
Unit shuts down.
CFGUMVFD screen.
Check phase-to-phase and phase-to-
ground distribution bus voltage.
Unit shuts down.
Increase Line Voltage Imbalance% in
CFGUMVFD screen.
Check Power Supply.
If operating from a generator, check
Unit shuts down.
generator size and speed.
Check utility power supply.
Check VFD communication wiring and
connectors.
Unit shuts down.
Check status lights on DPI Communica-
tions Interface Board.
Call Carrier Service.
Check fault code and possible cause in
Unit shuts down.
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 con-
Unit shuts down.
ditions causing the alarm must be cor-
rected in the VFD to enable subsequent
starts and operation.
Press Reset to Restore Configuration.
Unit shuts down.
Actual VFD checksum does not match
calculated value.
Check Temp Switch and Cooling Fans.
Unit shuts down.
Check for cooling fan air flow obstructions.
Unit shuts down. Load compatible version files into drive.
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