Midea ESG-Inv M Series - P3 Compressor Overcurrent Protection

ESG-Inv M
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Midea ESG-Inv M Series Pool Heat Pump Manual
5.22 P3 Troubleshooting
Digital display output
Procedure
P3: Compressor overcurrent protection
Power supply is abnormal
Yes
Ensure power supply is normal
No
Inverter module PCB is broken
1
Yes
Replace the inverter module PCB
No
Inverter module PCB is broken
2
Yes
Replace compressor
Notes:
1. Set a multi-meter to buzzer mode and test any two terminals of P N and U V W of the inverter module. If the buzzer sounds, the inverter module has short-
circuited.
2. The normal resistances of the inverter compressor are 1.5-2.5Ω among U V W and infinite between each of U V W and ground. If any of the resistances differ
from these specifications, the compressor has malfunctioned.
Protection logic
Normal operation
Current > 14A
Current < 14A
Error code P3
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