03-18
Troubleshooting 13
Indoor unit fan motor error
Detective details:
Forecast of cause:
Check Point 1 : Check rotation of Fan
Check Point 2 : Check for missing connectors and broken wires
OK
OK
OK
1. Fan rotation failure
2. Fan motor winding open
3. Motor protection by surrounding temperature rise
4. Power supply PCB failure
5. Indoor unit fan motor failure
6. Wrong fan motor connected
Try rotating the fan by hand when the operation is off to see
if the shaft is caught or locked.
>>If Fan or Bearing is abnormal, replace it.
Reinsert the connector. Or check the wiring continuity between the transformer
and fan motor and between the CN650 and controller PCB.
>>Replace the wire with connector or the wire.
When condition that actual frequency of
Indoor fan is below 1/3 of target frequency
is continued more than 56 seconds.
Detective actuators:
Indoor unit controller PCB
Indoor unit fan motor
Check Point 4 : 24V AC transformer check
Turn on the power and measure the voltage with a tester.
24V AC is OK.
Check Point 3* : Check the resistance value between pins of CN650
Is the resistance value between pin3 and 4 of CN650 of 5.7k 5% and a resistance
>>If it is not the specified resistance value, replace the controller PCB.
Indicate or Display:
Indoor unit
Operation lamp: 5 times Flash,
Timer lamp : 1 time Flash
Wired remote
Error code : [E : 51]
n
: n times blinking
: Light ON: Light OFF
Mode Error
2 5
15
Outdoor unit (AOG36/48LMAS1)
A B FEDC
*Check with the fan motor disconnected from the controller PCB and with the power off.
value between pin1 and 2 of 2.0k 5% ?
>>If it is not 24V, replace the transformer.
Replace fan motor
OK
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