Chery QQ, Service Manual

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Chery QQ Service Manual
（
2
）
check whether cracks or scratches exists at joints of the inlet and outlet. If
necessary, please repair it.
4. Expansion valve
Check before removal
（
1
）
connect the manifold pressure meter to the service valve.
（
2
）
make the engine run in a speed of 1000r/min and turn on the air conditioner.
（
3
）
check whether the low pressure meter shows 0.5g
（
5.0kg/
㎝
2
）
.
If reading is too low
（
lower than 0.5kg/
㎝
2
） ，
the expansion valve and/or stock
solution drier should be checked. If necessary, please replace it.
If reading is too high
（
higher than 0.5kg/
㎝
2
） ，
the thermal sensitive bulb bracket
should be fastened or the expansion valve should be replaced.
Removal
See “remove and disassemble” in the previous section of evaporator (thermantidote)
for details.
Installation
（
1
）
install the expansion valve in the contrary order of removing it.
（
2
）
restore the function of the air bag.
（
3
）
evacuate and charge the system in accordance with the above methods.
5. Thermistor of the evaporator
Thermistor, a kind of temperature sensors, serves to sense the temperature of air
discharged from the evaporator. Its electrical characteristics are as follows.
When the temperature is lower than the specified temperature, the ECU will make the
electric magnetic clutch disconnect to avoid the evaporator frosting.
Temperature
℃
Resistance k Ω
0 ℃ 6.65±5%
25 ℃ 2.0+10%
Remove
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