Omega WM 09K Service Manual page 46

11.3.3 Display E3, E7
Reasons:
1) Outdoor pipe temp sensor, outdoor temp sensor & exhaust temp sensor connection terminal loose or not
plugged in.
Solution: Check the connecter of sensor and slot, if loose or not plugged in, please connect again.
2) Outdoor pipe temp sensor, outdoor temp sensor & exhaust temp sensor damage (short or broken).
Solution: Check and replace the sensor.
3) Outdoor PCB damage.
Check and replace the outdoor PCB.
Solution:
11.3.4 Display E8
Reasons:
1) Outdoor discharge pipe temp sensor connection terminal loose or not plugged in.
Solution: Check the connecter of sensor and slot, if loose or not plugged in, please connect again.
Outdoor pipe temp sensor damage.
2)
Solution: Check and replace the sensor.
3) Outdoor PCB damage.
Solution: Check and replace the outdoor PCB.
11.3.5 Display E0,E5
:
Reason Indoor / outdoor communication damage.
Solution:
1) Check if the indoor and outdoor connections are correct. The terminal L and N which connect to indoor
unit shall correspond to each other on indoor and outdoor units. Measure the voltage on outdoor
Air Conditioner Service Manual
Fail
Fail
OK
OK
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