TCL U-MATCH-R32 Series - Troubleshooting Sensor Failures (E1, E2)

TCL U-MATCH-R32 SERIES DC INVERTER AIR CONDITIONERS SERVICE MANUAL
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3.3.2 E1, E2 ---IDU Room temperature sensor and/or coil temperature sensor failure.
Start
Display E1or E2
Is the sensor well
connected to PCB
No
Re-connect
Yes
Yes
E1/E2
disappear?
No
Multi-meter check the
sensor, is it open or
short circuit?
Yes
Replace the sensor
No
The malfunction
eliminated?
Yes
No
Replace IDU PCB
End