Midea ESG-Inv M Series - Page 45

ESG-Inv M
44
Midea ESG-Inv M Series Pool Heat Pump Manual
5.13 H1 Troubleshooting
Digital display output
Procedure
Note:
1. The connection is between CN43 on the main PCB and CN10 on the Inverter module PCB.
H1: Communication malfunction between main
control board and inverter board
The connection between main PCB and inverter
module is loosen
1
Yes
Ensure the connection is firm
No
The voltage of CN10 on inverter PCB isn’t 12VDC
Yes
Replace the inverter PCB
No
The voltage of CN43 on refrigerant PCB isn’t
12/5VDC
No
Replace the main PCB
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