BGH BSBSIC24CTK Manual page 43

Troubleshooting
6. E5 malfunction
E5 display
Voltage protection of compressor
No
Check the voltage of outdoor unit power supply, whether the voltage
Check the power supply
between L(1) and N is about 172-265V
Yes
Yes
Replace the power board, then check whether the system can run normally
Trouble is solved
No
Replace outdoor main board
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