Perfect Aire 3PAMS18-HH-MZO2, Service Manual

Page: 115 / 181

114
Current protection of compressor
Judge 1: Check whether the input
current of the power supply wire
is more than 15A(18K) (For
27K&hyper heat 18K, it is
18.5A.For 36K&hyper heat 27K, it
is 22.5A.For 48K&hyper heat
36K, it is 28A)
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
Replace outdoor main board No