Chery QQ - Insufficient Refrigerant; Symptom Insufficient Cold Air

Chery QQ Service Manual
at low pressure side
sometimes is normal,
but sometimes vacuum.
the refrigeration
system ices in the
spraying hole of
the expansion valve
to make the
circulation stop
temperarily, but
after the ice melts,
it can work
normally.
oversaturation
↓
Water vapor ices at
the spraying hole of
the expansion valve to
block circulation of
refrigerant.
solution drier
(2) evacuate air
repeatly to eliminate
the vapor in the
circulation.
(3) charge appropriate
amount of new
refrigerant.
3. Insufficient refrigerant
Symptom：insufficient cold air
Fault symptom of
refrigeration system
Possible reasons Fault diagonosis Trouble-shooting action
Low pressure at both
low pressure side and
high side
bad cooling Performance
air leakage at
somewhere in
refrigeration
system
Insufficient
refrigerant in system
↓
Refrigerant leakage
（1）using air leakage detector to
check where there is leakage.
If necessary, repair it.
（2）charge appropriate amount
of refrigerant.
（3）if the reading is about 0
after connecting the meter, the
leakage positions should be
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