M‐Thermal Split
74
201909
Midea M‐Thermal Split Ser
vice Manual
Situation 3: L0 or L4 error appears after the compressor has been running for a period of time and the compressor
speed is over 60rps
L0 / L4
Inverter module has overheated
Yes
Repaint the thermally conductie silica
gel on the IPM module, IGBT, diode,
brigde rectifer
(on the reverse side of
the inverter module PCB)
1
No
Inverter module is over‐current
2
Yes
Replace the compressor
No
Replace the inverter module
3
Notes:
1.
Refer to Figure 4‐4.1.
2.
Use clip‐on ammeter to measure the compressor current, if the current is normal indicates the inverter module is failed, if the current is abnormal
indicates the compressor is failed.
3.
When replacing an inverter module, a layer of thermally conductive silica gel should be painted on the PFC and IPM modules (on the reverse side of the
inverter module PCB). Refer to Figure 4‐4.1.
Situation 4: L0 error appears occasionally/irregularly
L0
The outdoor unit ventilation is not good
Yes
Ensure enough space for unit ventilation
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...
