M‐Thermal Split
201909 81
Procedure
PP
Water side heat exchanger water inlet /
outlet temperature sensor is loose
1
Yes
Ensure the temperature sensor is
connected properly
No
Water side heat exchanger water inlet /
outlet temperature sensor has
short‐circuited or failed
2
Yes
Replace the temperature sensor
No
The 4‐way valve is blocked or damaged
3
Yes
Replace the 4‐way valve
No
Replace outdoor main PCB
Notes:
1.
water side heat exchanger water inlet temperature sensor and water side heat exchanger water outlet temperature sensor connections are port CN6 on
the hydronic box main PCB (labeled 11 in Figure 4‐2.1 in Part4, 2.2 "Main PCB for Hydronic System").
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, 1.2 “Hydronic Box Layout” and to Table 4‐5.1 to 4‐5.2 in Part 4, 5.1 “Temperature Sensor
Resistance Characteristics”.
3.
Restart the unit in cooling mode to change the refrigerant flow direction. If the unit does not operate normally, the 4‐way valve is blocked or damaged.
Midea CAC Confidential
Summary of Contents for SMK-60/CGN8
Page 1: ...M Thermal Split Series Commercial Air Conditioners R32 Service Manual Midea CAC Confidential...
Page 3: ...M Thermal Split 2 201909 Midea M Thermal Split Service Manual Midea CAC Confidential...
Page 7: ...M Thermal Split 6 201909 Midea M Thermal Split Service Manual Midea CAC Confidential...
Page 15: ...M Thermal Split 14 201909 Midea M Thermal Split Service Manual Midea CAC Confidential...