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8. Fault code P3: compressor overcurrent protection
has tripped
Is the input current
greater than 20A?
Check refrigerant pipes
No
Yes
Is the outdoor
temperature too high?
Switch off unit
Yes
Yes
Is the function of the
fan on the outdoor
component OK?
No
Ensure fan functions
properly
Is the register of the
outdoor component
dirty?
Are the refrigerant
pipes blocked or bent?
Yes
Siphon off refrigerant,
replace pipe / remove
blocked, perform
pressure test, drawn
vacuum and refill
Clean the register of the
outdoor component
No
Replace outdoor
component main board
No
Yes
No
43
43


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