TCL Free Match TAC-12CHSD/XA41-I - Troubleshooting E3 and E7 Errors; Causes of E3;E7 Errors; Troubleshooting E8 Display Error; Troubleshooting E0 and E5 Errors

Air Conditioner Service Manual
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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.
Solution: Check and replace the outdoor PCB.
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.
2) Outdoor pipe temp sensor damage.
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
Fail
OK
Fail
OK