Geely FC. Manual part — 55
Geely FC. Manual part - 55
Air conditioner--Refrigerant
z
The pressure of high and low
pressure end is low.
z
The pipeline from condenser
to expansion valve frosts.
z
Refrigerant flow in adjuster
is obstructed by impurity.
z
Change the condenser.
z
Adjuster is obstructed.
Phenomenon
Possible reason
Diagnose
Method
State: cooling degree is not enough
(4) Refrigerant cycle is poor
(5) Refrigerant does not have any cycle.
z
Low pressure side is
vacuum, and pressure at
high pressure side is low.
z
The pipeline of front and
rear end of expansion
valve or adjuster frosts or
dews.
z
Refrigerant flow in cool-
ing system is obstructed
by water vapor or dust.
z
Refrigerant flow is ob-
structed by expansion
valve.
(1)Check the expansion
valve.
(2)Remove the dirt in ex-
pansion valve with high
pressure air.
(3)Change condenser.
(4)Take out vacuum and fill
applicable refrigerant.
(5)If this is caused by ex-
pansion valve leakage,
change the valve.
Refrigerant does not flow.
Phenomenon
Possible reason
Diagnose
Method
State: not cool (sometime cool)
217
Air conditioner--Refrigerant
z
The pressure of high and
low pressure end is high.
z
There is no bubble on
window when engine
speed decreases.
z
Too much refrigerant in
system incurs this.
z
Heat dispersion of con-
denser is bad.
(1)Clean the condenser.
(2)Check the function of
cooling fan.
(3)If those two items above
are normal, check the re-
frigerant quantity. Fill
applicable refrigerant.
z
Filled refrigerant is too
much.
z
Heat dispersion of con-
denser is bad ¡ú
¡ú
¡ú
¡ú
¡ú
heat dis-
persion sheet of con-
denser is obstructed or fan
engine has malfunction.
Phenomenon
Possible reason
Diagnose
Method
State: cooling degree is not enough.
z
The pressure of high and
low pressure end is high.
z
Pipeline of low pressure
end is too hot to contact.
z
T h e r e i s b u b b l e o n
window.
Air enters cooling system.
(1)Check whether the Re-
frigerant oil is too dirt or
lack.
(2)Take our vacuum and fill
new refrigerant.
z
There is air in cooling
system.
z
I t d o e s n o t t a k e o u t
vacuum completely.
Phenomenon
Possible reason
Diagnose
Method
State: cooling degree is not enough.
(6) Refrigerant is too much or the radiating fin of condenser is bad
(7) Air enters cooling system
Note: if cooling system is
opened, and it does not
take out vacuum when
filling refrigerant, this
state will happen.
218
Air conditioner--Refrigerant
z The pressure of high and low
pressure end is high.
z Pipeline of low pressure end
frosts or dews heavily.
E x p a n s i o n v a l v e h a s
malfunction.
Check the expansion valve.
z Refrigerant in low pressure
pipeline is too much.
z Open degree of expansion
valve is too big.
Phenomenon
Possible reason
Diagnose
Method
State: cooling degree is not enough
z The pressure of low pressure
end is too high.
z The pressure of high pres-
sure end is too low.
There is inner leakage in
compressor.
R e p a i r o r c h a n g e t h e
compressor.
z Compressor is bad.
z Expansion valve leaks or
sliding part is damaged.
Phenomenon
Possible reason
Diagnose
Method
State: not cool
(8) Expansion valve is bad
(9) Not cool
219
Air conditioner--Refrigerant
Reading of filling meter (referred value)
220
Pressure of low pressure side
Fan “HI” phase
Blower “LO” phase
Pressure of high
pressure side
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