Airwell johnson JOAU-ZCY218-H11, Service Manual

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Troubleshooting
114 Electrical Control System
2.4.2.7 Current protection of compressor(ODU P3)
Current protection of compressor
Judge 1: Check whether the
input current of the power
supply wire is more than 15A
(For 27K(1x3) , it is 18.5A .For
36K(1x4), it is 23A
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