Air Conditioner Service Manual
1
1
Failure code: For the machine has LED, the code displays on LED, for no LED machine, the code
reflects by the running light.
Failure
Running Light Flash
LED Display
RT Sensor Failure
Once / Period
E1
IPT Sensor Failure
Twice / Period
E2
Indoor Fan Motor Failure
6 times / Period
E6
When there is LED displaying failure code, the code is displayed statically, if there are several failure
codes should be reported at the same time, then failure codes appears one by one every eight
seconds correspondingly.
a. Sensor’s failure protection: when the sensor’s temperature is out of the range -50
≤
T
≤
110
℃
,
then sensor failue is determined. Once RT, IPT sensor failures appear, the compressor stops and
indoor and outdoor fan motors shut off. Remote controller deesn’t response to any signal except for
shutdown. During failure the machine can run in fan mode. After the failure is settled, the PCB
restores to standby status.
b. Failure protection of Indoor PG fan motor:If there is no feedback signal of rotate speed within 5, the
indoor fan motor stops,at the same time, the compressor, outdoor fan moto, four-way valve and
auxiliary electric heater etc cut downn. 10 seconds later, the indoor fan motor restarts, once there is
no feedback signal of rotate speed within 5 seconds either, then the machine stops and goes into
indoor fan motor failure protection, buzzer rings three times, and running light flashes at 6 times per 8
seceonds. When the failure is confirmed, once there is feedback signal,the failue is relieved
automatic.
