Air Conditioner Service Manual
2) The following table shows the fault protections. When failures happens, the PCB alarms and
buzzer rings three times. Failure code appears, and the PCB operates protection procedures.
Failure code: For the machine with LED display, the code shows on LED, for machine without LED,
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 failure happened, 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°C≤T≤110°C,
then sensor failure is determined. Once RT, IPT sensor failures appear, the compressor stops and
indoor and outdoor fan motors shut off. Remote controller doesn’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 5s,
the indoor fan motor stops, meanwhile, the compressor, outdoor fan motor, four-way valve and
auxiliary electric heater etc. cut down. 10 seconds later, the indoor fan motor restarts again, 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 seconds. When the failure is confirmed, once there is feedback signal, the failure is
relieved automatic.
10
To Next Page
Loading...
