Midea PTAC Series Service Manual page 27

10.2 Troubleshooting
10.2.1 Open circuit or short circuit of temperature sensor diagnosis and solution(AS/E5/CS/oS/HS)
Error Code
Malfunction decision
conditions
Supposed causes
Troubleshooting:
T5/T6
AS/E5/CS/oS/HS
If the sampling voltage is lower than 0.06V or higher than 4.94V, the
LED will display the failure.
Wiring mistake
●
Faulty
●
Faulty
●
Check the connection
between temperature
sensor and PCB.
Yes
Measure the resistance
value of the sensor
Yes
Replace indoor main PCB
T4
T3
T2
T1
sensor
PCB
No
Correct the connection
No
Repalce the sensor
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