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Procedure
Air side heat exchanger refrigerant outlet
temperature sensor is loose
Air side heat exchanger refrigerant outlet
temperature sensor has short‐circuited
The air side heat exchanger heat
exchange is poor
The fan or fan motor is blocked or
Replace outdoor main PCB
Notes:
1.
Air side heat exchanger refrigerant outlet temperature sensor and outdoor ambient temperature sensor connection port are CN9 on the outdoor unit main
PCB ( labeled 12 in Figure 4‐2.2 in Part4, 2.3 "Main PCBs for Refrigerant System, Inverter Module")..
2.
Measure sensor resistance. If the resistance is too low, the sensor has short‐circuited. If the resistance is not consistent with the sensor's resistance
characteristics table, the sensor has failed. Refer to Part 2, 1.1 "Outdoor Unit Layout" and to Table 4‐5.1 in Part 4, 5.1 "Temperature Sensor Resistance
Characteristics".
3.
Check air side heat exchanger, fan and air outlets for dirt/blockages.
201909 79
Pd
1
No
2
or failed
No
3
No
damaged
No
Midea CAC Confidential
Ensure the temperature sensor is
Yes
connected properly
Yes
Replace the temperature sensor
Yes
Inspect the system and fix the error
Yes
Inspect the system and fix the error
M‐Thermal Split
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