Midea M-Thermal Series Service Manual page 59

M‐Thermal Split
4.12 H7 Troubleshooting
Digital display output
Description
 Abnormal main circuit voltage.
 M‐Thermal Split stops running.
 Error code is displayed on outdoor unit main PCB and user interface.
Possible causes
 Power supply voltage not within 90%~110% of rated voltage.
 Outdoor unit main PCB is damaged.
Procedure
Power supply voltage is not within
90%~110% of rated voltage
Replace outdoor unit main PCB
58
H7
No
Midea CAC Confidential
Yes
Provide normal power supply
201909