M thermal Mono
202008 55
4.13 H7 Troubleshooting
Digital display output
4.13.1
Description
4.13.2
Abnormal main circuit voltage.
M thermal Mono stops running.
Error code is displayed on outdoor unit main PCB and user interface.
Possible causes
4.13.3
Power supply voltage not within 90%~110% of rated voltage.
Outdoor unit main PCB is damaged.
Procedure
4.13.4
H7
Power supply voltage is not within
90%~110% of rated voltage
Yes
Provide normal power supply
No
Replace outdoor unit main PCB
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