2.4.4.13. Porucha P3
P3 display
Current protection of compressor
Judge 1: Check whether the
input current of the power
supply wire is more than
20A (For 36K & 48K with 1
phase, it is 30A)
Yes
Replace the electric control box
Check whether
the refrigerant
system is ok
Judge 2: Check whether the
outdoor ambient
temperature is higher than
50
℃
No
Stop the unit
Yes
Judge 3: Check whether the
outdoor unit is bad ventilation
No
Make the outdoor unit ventilate well
Yes
Judge 5: The refrigerant
pipe is blocked
No
Let the refrigerant out, then use the high
pressure nitrogen or refrigerant to blow pipe,
vacuumize and charge the refrigerant again
Yes
Judge 4: Check whether the
heat exchanger is dirty
No
Clean the heat exchanger
Yes
Yes
Replace outdoor main
board,and check whether
the system can run normally
No
Yes
Trouble is solved