M thermal Split
202004 63
4.8 F1 Troubleshooting
Digital display output 4.8.1
Description 4.8.2
Low DC generatrix voltage.
M thermal Split stops running.
Error code is displayed on hydronic system main PCB and user interface.
Possible causes 4.8.3
The DC generatrix voltage is too low.
Procedure 4.8.4
F1
Power supply is abnormal.
Yes
Provide normal power
No
LED on the Inverter
Modules is lighting
Yes
Voltage of PN is 380V.
Yes
Check the main board.
No
The input power of
inverter module is
abnormal
Yes
The main board is
damaged, change it.
No
The invert module is
damaged, change it.
Midea CAC
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