Chery QQ - Excessive Charge of Refrigerant or Insufficient Refrigerating of Condensator Symptom Insufficient Cold Air

Chery QQ Service Manual
Fault symptom of
refrigeration
system
Possible reasons Fault diagonosis Troubleshooting action
Low pressure side
indicates vacuum and
high pressure side
indicates too low
pressure.
Frost or dew appears
on the pipes before
and behind the
reservoir, drier and
expansion valve.
Refrigerant can not
flow because the water
vapor or dirt block the
refrigeration system
Refrigerant can not
flow because the
thermal sensitive pipe
of the expansion valve
leaks air or is blocked.
Refrigerant
doesn’t circulate
（1 ）check the thermal
sensitive pipe, expansion
valve and pressure
regulator of the evaporator.
（2）blow out the dirt in
the expansion valve with
air
（3）if the dirt can not be
removed, expansion valve
should be replaced.
（4 ）evacuate air from
system and charge
appropriate amount of new
refrigerant.
If thermal sensitive pipe
leaks air, the expansion
valve should be replaced.
6. Excessive charge of refrigerant or insufficient refrigerating of condensator
symptom：insufficient cold air
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