MCAC-UTSM-2008-05 Troubleshooting
Outdoor Units 65
8. P3 malfunction
LED indicates P3
Outdoor unit current protection
Judge 1: Check whether the input current of the power supply wire
is more than 18A
Check whether the refrigerant system is ok
Yes
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
To Next Page
Loading...
