Vivax ACP-12CT32AEI/I Service Manual page 49

Troubleshooting
6. P1 malfunction
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
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
Judge 5: Check whether the heat exchanger is dirty
Judge 6: Check whether the refrigerant pipe is blocked
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LED indicaptes P1
High pressure protection
Yes
No
No
No
No
No
Replace outdoor main board
No
Yes
Replace high pressure switch
Yes
Yes
Yes
Drop refrigerant, then use the high pressure
Yes
nitrogen or refrigerant to blow pipe,
vacuumize and add the refrigerant again
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MCAC-UTSM-2008-04
Connect it well
Stop the unit
Make the outdoor unit ventilate well
Clean the heat exchanger
Outdoor Units