Midea MOU-12HN1 User Manual page 121

MCAC-UTSM-2008-11 Troubleshooting
10.2 Solving steps for typical malfunctio
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(1) For the new four-way cassette
E2: Indoor temperature sensor is abnormal
E2
No
Whether the resistance of the room temp. sensor is 10K
Replace temp. sensor
Yes
Replace the PCB
E3: Evaporator temperature sensor is abnormal
E3
No
Whether the resistance of the evaporator temp. sensor is 10K
Replace evaporator temp. sensor
Yes
Replace the PCB
E4: Condenser temperature sensor is abnormal
E4
No
Whether the resistance of the condenser temp. sensor is 10K
Replace condenser temp. sensor
Yes
Replace the PCB
Outdoor Units 119