Carrier SmartVu Control Manual page 115

Alm-431 ALM-431 VFD Fault -
VFD Power On Reset
Alm-432 ALM-432 VFD Fault -
Ground Fault
Alm-433 ALM-433 VFD Fault -
Line Phase Reversal
Alm-434 ALM-434 VFD Fault -
Motor Overload Trip
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
Alm-443 ALM-443 VFD Fault -
Rectifier Overtemp
Alm-444 ALM-444 VFD Fault -
Inverter Overtemp
SRDC-UG-2-14-000
19 Series Carrier®
–
TM
SmartVu
Controls IOM
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REVISION DATE
2.3 Dec 4, 2020
high transient voltage conditions. VFD
Circuit Board malfunction.
Call Carrier Service
Temporary loss of VFD control voltage.
Check VFD control power breaker,
transformer and fuses
Check for condensation on motor
terminals.
Check motor power leads for phase to
phase or phase to ground shorts.
Disconnect motor from VFD and megger
motor.
Call Carrier Service.
Reverse connections of any two line
conductors to circuit breaker.
Check VFD configurations
Any phase current > 106% RLA. Can
result from significant load side current
imbalance when running at full load.
Check entering condenser water
temperature and water flow rate.
Check Motor Rated Load Amps in
CFGUMVFD screen.
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.
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