Poor cooling effect
Yes
Eliminate affected factors or
re-select installation location of unit
No
No
No
Clear sundries
Clean filter
No
Repair or replace motor
Compressor runs
Yes
Axial flow fan runs
Installation location
of unit conforms to requirements or there
isn’t any factor around the unit which
affects heat dispersion of unit
Yes
Yes
Yes
No
Repair or replace
compressor
Condenser isn’t
blocked by sundries
Filter in air return
box is not blocked
Repair or replace motorCentrifugal fan runs
Yes
No
Yes
Pipeline system is
normal in respect of low/high
pressure detection
Shortage of refrigerant
or nozzle for adding
freon leaks refrigeran
Piping system,capillary
or strainer is blocked
No
Clean or replace
it after disassembly
Replace
Yes
Yes
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