M‐Thermal Split
201909 65
Procedure
P3
No
The condenser heat exchange is poor
1
Yes
Inspect the system and fix the error
No
The high pressure side is blocked, caused
by crushed or bent pipe or blocked EXV
2
Yes
Inspect the system and fix the error
No
Inverter module has short‐circuited
3
Yes
Replace the inverter module
No
Compressor has malfunctioned
4
Yes
Replace the compressor
No
Replace outdoor main PCB
Notes:
1.
In heating mode check water side heat exchanger, water piping, circulator pumps and water flow switch for dirt/blockages. In cooling mode check air side
heat exchanger, fan and air outlets for dirt/blockages.
2.
High pressure side blockage causes discharge temperature to be higher than normal, discharge pressure to be higher than normal and suction pressure to
be lower than normal.
3.
Set a multi‐meter to buzzer mode and test any two terminals of P N and U V W of the inverter module. If the buzzer sounds, the inverter module has
short‐circuited.
4.
The normal resistances of the inverter compressor are 0.7‐1.5Ω among U V W and infinite between each of U V W and ground. If any of the resistances
differ from these specifications, the compressor has malfunctioned.
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...