Midea MIV V4+ Mini Service Manual page 44

MIV V4+ Mini DC Inverter R410A (220V, 8 kW)
11) P5 malfunction
When condenser high temp. is more than 65°C, the unit will stop, and unit runs again when outdoor pipe temp.
less than 52°C.
LED indicates P5
Condenser high temperature protection
Check whether the condenser temperature is more than 65°C
Check whether the resistance of condenser
temp. sensor is correct refer to the Annex 1
Replace outdoor PCB
Clean the heat exchanger
Drop refrigerant, then use the high pressure
nitrogen or refrigerant to blow pipe,
vacuumize and add the refrigerant again
42
No
No
Yes
Yes
Stop the unit
Yes
Judge 2: Check whether the heat exchanger is dirty
Yes
Yes
Replace the temperature sensor
Judge1: The outdoor temp. is too high(more than 43 )
Judge 3: The refrigerant pipe is blocked
Replace outdoor PCB
DM12-01.01.05en
No
No
No
Outdoor units