Aiwa -09CHSRINV/TP11 Service Manual page 40

3.2.2 E1, E2 ---IDU Room temperature sensor and/or coil temperature sensor failure.
Air Conditioner Service Manual
Start
Display E1or E2
No
Is the sensor well
connected to PCB
Yes
No
Multi-meter check the
sensor, is it open or
short circuit?
Yes
Replace IDU PCB
End
Re-connect
Yes
E1/E2
disappear?
No
Replace the sensor
Yes
The malfunction
eliminated?
No
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