Midea MV5-X252W/V2GN1 Service Manual page 58

4.5.4 Procedure
Temperature sensor connection on main
Temperature sensor has short-circuited
Replace outdoor main PCB
Notes:
1. Outdoor ambient temperature sensor connection is port CN1 on the main PCB (labeled 32 in Figure 5-2.1 in Part 5, 2.2 "Ports"). Compressor top
temperature sensor and discharge pipe temperature sensor connections are ports CN10 and CN11 on the main PCB (labeled 1 and 2, respectively, in Figure
5-2.1 in Part 5, 2.2 "Ports").
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 "Layout of Functional Components" and to Table 5-5.1 or 5-5.2 in Part 5, 5.1 "Temperature
Sensor Resistance Characteristics".
201608
E4 / E7
1
PCB is loose
No
2
or failed
No
Yes
Ensure the sensor is connected properly
Yes
Replace the sensor
V5 X VRF 50/60Hz
57