EMW90HDNC1A Air-cooled Chiller
Condenser is badly dirty
and blocked.
There is sundry jam in
front of the outdoor air
return outlet of water
chiller.
Clean up the dirty blockage in
front of the air return outlet on
the indoor side of the unit.
External circulation fan is
out of power or working
abnormally.
Repair or replace the external
circulation fan when it is not
caused by power failure.
System Low
Pressure
Alarm
Locking
Three system
low-pressure alarms
occurred within one
hour.
Check the leakage point and
replenish the refrigerant after
repair.
Electronic expansion
valve works abnormally.
Replace the electronic
expansion valve.
Exhaust
Temp Too
High Locking
Three high exhaust
temperature alarms
occurred within one
hour.
Outdoor temperature is
too high.
Check the outdoor temperature.
There is sundries
blockage in the outdoor
air return outlet of water
chiller.
Clean up the sundries at the
outdoor air outlet of water
chiller.
The external circulation
fan is powered off, or it
works abnormally.
Repair or replace the external
circulation fan when it is not
caused by power failure.
Condenser is badly dirty
and blocked.
Freq
Converter
Over Current
Locking
Three frequency
converter over-current
alarms occurred
within one hour.
Inverter output circuit is
grounded or
short-circuited.
Troubleshoot the output circuit.
Adjust the voltage to the normal
range.
Inverter selection is too
small.
Replace the inverter with higher
power level.
The motor is
short-circuited to ground.
Replace cables or motors.
The acceleration time is
too short, which leads to
acceleration overcurrent.
Increase the acceleration time.
Manual torque increase
or improper V/F curve
leads to acceleration
overcurrent.
Adjust the manual lifting torque
or V/F curve.
Starting the rotating motor
leads to accelerating
overcurrent.
Wait for the motor to stop
before starting.
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