Trouble shooting 16
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 and 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.
02-17
Indicate or Display:
Error code : 53 Outdoor unit : No indication
Check Point 4 : Check Controller PCB and Drain Pump
If drain pump is not run on the working condition, check the voltage of the CN71 on the controller PCB.
12V : Replace the Drain Pump
Measurement result
Other than 12V : Replace the controller PCB
OK
Check Drain Pump.
WHITE
RED
CN71-1
CN71-2
CN71-3
CN71-4
CN71
DC DRAIN PUMP MOTOR
M
B
DC12V
AMP Air Conditioning
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