Midea MIV V4+ Mini, Руководство по обслуживанию

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MIV V4+ Mini DC Inverter R410A (220V, 8 kW) DM12-01.01.05en
40 Outdoor units
9) P3 malfunction
LED indicates P3
Outdoor unit current protection
Judge 1: Check whether the input current of the power supply
wire is more than 15A
Check whether the refrigerant system is ok
Yes
No
Replace the filter board,
then check whether the
system can run normally
Judge 2: Check whether the outdoor ambient temperature is too high
Yes
Stop the unit
Replace outdoor main board
No
No
Judge 3: Check whether the outdoor unit is bad ventilation
Yes
Make the outdoor unit ventilate well
No
Judge 4: Check whether the heat exchanger is dirty
Yes
Clean the heat exchanger
No
Judge 5: The refrigerant pipe is blocked
Yes Drop refrigerant, then use the high pressure
nitrogen or refrigerant to blow pipe,
vacuumize and add the refrigerant again
Trouble is
solved
No
Replace outdoor PCB
Yes