19 Series Carrier®
SmartVu
TM
–
Controls IOM
Check VFD refrigerant cooling solenoid
and refrigerant strainer.
Check for proper VFD cooling fan
operation and blockage.
ALM-445 VFD Fault -
Motor Current
Imbalance
Check Motor Current Imbalance% in
CFGUMVFD screen.
ALM-446 VFD Fault -
Line Voltage Imbalance
Check phase-to-phase and phase-to-
ground distribution bus voltage. Increase
Line Voltage Imbalance% in CFGUMVFD
screen.
ALM-447 VFD Fault -
Frequency Fault
Check Power Supply
If operating from a generator, check
generator size and speed.
Check utility power supply.
ALM-448 VFD Fault -
VFD Comm Fail
Check VFD communication wiring and
connectors.
Check status lights on DPI
Communications Interface Board.
Call Carrier Service.
ALM-449 VFD Fault -
VFD Fault
Check fault code and possible cause in
corresponding type of VFD user manuals
Call Carrier Service
ALM-450 VFD Fault -
VFD Start Inhibit
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 VFD Fault -
VFD Checksum Error
Press Reset to Restore Configuration.
Actual VFD checksum does not match
calculated value.
ALM-452 VFD Fault -
Inductor Overtemp
Switch
Check Temp Switch and Cooling Fans.
Check for cooling fan air flow obstructions
ALM-453 VFD Fault -
Incompatibility Fault
Load compatible version files into drive
VFD Fault - Main
Power Failure
Check the main power to VFD
Refer to Danfoss VFD trouble shooting
manual
VFD Fault - Power
Card Over
Temperature
VFD Fault - Ctrl Card
Over Temperature
VFD Fault - Control
Word Timeout
VFD Fault - Motor
Thermistor Over Temp
VFD Fault - Motor Etr
Over Temperature
VFD Fault - Inverter
Overload
VFD Fault - DC Link
Under Voltage
VFD Fault - DC Link
Over Voltage