45
10.3.3.7 Current protection of compressor (ODU P3)
Yes
No
Yes
Yes
No
Judge 5: The refrigerant
Y
pipe is blocked
es
No
Replace outdoor main
board,and check whether
the system can run normally
Yes
No
Yes
Trouble is solved
Replace the electric control box
Let the refrigerant out, then use the high
pressure nitrogen or refrigerant to blow pipe,
vacuumize and charge the refrigerant again
Judge 1: Check whether the
input current of the power
supply wire is higher than max
protection current value
Yes
Check whether
the refrigerant
system is ok
Judge 2: Check whether the
outdoor ambient
temperature is higher than
50
℃
Current protection of compressor
Stop the unit
Judge 3: Check whether the
outdoor unit is bad ventilation
No
Judge 4: Check whether the
heat exchanger is dirty
Make the outdoor unit ventilate well
Clean the heat exchanger
Summary of Contents for RM2-053B-OU
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