Trouble shooting 17
INDOOR UNIT Error Method:
Drain Pump Error
Detective Actuators:
Indoor unit Controller PCB Circuit
Float switch
Detective details:
When Float switch is ON for more than 3 minutes.
Check Point 1 : Check Float switch
Check operation of float switch. (any blocking by dust, etc.)
Remove Float switch and check ON/OFF switching operation
by using a meter.
>>If Float switch is abnormal, replace it.
ON OFF
OK
Forecast of Cause :
1. Float switch failure 2. Shorted connector/wire 3. Controller PCB failure
4. Drain pump failure 5. Hose clogging
Check Point 2 : Check Connector and Wire
Check loose contact of CN9 /shorted wire (pinched wire).
>>Replace Float switch if the wire is abnormal
OK
Check Point 3 : Check Drain hose
Check Drain hose .
>>If there is Hose clogging. Please clear the clog.
02-18
Indicate or Display:
Error code : 53 Outdoor unit : No indication
Check Point 4 : Check Controller PCB and Drain Pump
OK
If drain pump is not run on the working condition,
check the voltage of the CN71 on the controller PCB.
Measurement result
12V : Replace the Drain Pump
Other than 12V : Replace the controller PCB
Check Drain Pump.
WHITE
RED
CN71-4
CN71-3
CN71-2
CN71-1
CN71
DC DRAIN PUMP MOTOR
M
B
DC12V
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