R410A 50Hz Tropical Split AC MCAC-UTSM-2012-12
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Judge 1: Whether the wiring between the high pressure switch
and main control board is connected well or correctly
Judge 2: Whether the high pressure switch is broken
Validate: Short connect the high pressure switch
socket, check whether the system can run normally
Replace high pressure switch
Check whether the refrigerant system is ok
Judge 3: Check whether the outdoor ambient temperature is too high
Judge 4: Check whether the outdoor unit is bad ventilation
Make the outdoor unit ventilate well
Judge 5: Check whether the heat exchanger is dirty
Judge 6: Check whether the refrigerant pipe is blocked
Drop refrigerant, then use the high
pressure nitrogen or refrigerant to
blow pipe, vacuumize and add the
refrigerant again
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