Midea Mini VRF MDV-V105W/DN1 Technical & Service Manual page 100

MCAC-VTSM-2016-10
7.11 P3: Compressor current protection (for all models)
It will protect when input current is more than 30A. It will recover when input current is less than 30A.
It will recover automatically.
Check whether the input current of the power wire is more
Check cooling system is normal or not.
Check whether the outdoor ambient temperature is too high.
Check whether the outdoor unit ventilates well.
`
Whether the heat exchanger needs cleaning or not.
If the refrigerant pipe is blocked or not?
Replace the outdoor PCB.
Troubleshooting
LED displays P3
Input current protection
than 30A.
YES
NO
NO
NO
NO
R410A All DC Inverter Mini VRF
YES
YES
Make the outdoor unit
YES
Clean heat exchanger.
Remove the refrigerant pipe and then use
YES
high pressure nitrogen or refrigerant to blow
the pipe. Vacuume the pipe then add the
refrigerant again.
Stop the unit.
ventilates well.
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