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3. The air-conditioning system is in poor operation
Common faults
phenomenon
High pressure and
low pressure are
both too high
High pressure is
slightly low and
low pressure too
low
High pressure is
slightly low, low
pressure is too
high
2. Air conditioning air duct is
blocked
4. The evaporation fan fuse is
fused or the relay is damaged
5. Evaporation fan is damaged
6. The input voltage of the
evaporation fan is low
Faults reason
1. Excessive refrigerant
2. The air enters into the refrigeration
cycle
3. Condensate fan fuse fuse or fan
relay is damaged
4. The condensate fan is damaged
5. Condensed fins are blocked with
dirt
1. Insufficient refrigerant
2. Evaporator fins are dirty and
blocked (the evaporator has frost)
compressor Internal valve plate is
damaged
Clean the air duct
Check and replace
Check and replace
Check the air conditioning wiring and
grounding
Troubleshooting method
Slowly release the excess
refrigerant
Remove
vacuum and fill the refrigerant
Check and replace
Repair, replacement
clean the condenser fins
Check the leakage site and fill
with the refrigerant
clean the evaporator fins
Repair
compressor
14
the
refrigerant,
and
replace
the
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