Suzuki WagonR+ RB310 Service Manual page 2085

1B-6 AIR CONDITIONING (OPTIONAL)
CHECKING REFRIGERANT CHARGE
Item
Symptom
No.
1 Bubbles observed in sight glass
2 No bubbles observed in sight glass
3 No temperature difference
between compressor inlet and
outlet
4 Noticeable temperature difference
between compressor inlet and
outlet
5 When A/C is turned OFF,
refrigerant in sight glass clears
immediately and remains clear
6 When A/C is turned OFF,
refrigerant in sight glass once
produces bubbles and then clears
QUICKLY CHECKING OF REFRIGERANT
CHARGE
CHARGE OF REFRIGERANT
When the A/C inlet temperature is within 30 – 35_C.
The following procedure can be used for quickly checking whether
the A/C system has a proper charge of refrigerant or not.
Run engine at fast idle, and operate A/C at its maximum cooling ca-
pacity for a few minutes. Then, look at the sight glass (1) on liquid
pipe (2) and compare what is observed with the symptoms listed in
"CHECKING REFRIGERANT CHARGE" table given below.
Charge of refrigerant
Insufficient charge of
refrigerant in system
No or insufficient charge of
refrigerant in system
Empty or nearly empty system
Proper or too much charge of
refrigerant in system
Too much charge of refrigerant
in system
Proper charge of refrigerant in
system
Correction
Check system for leaks with a
leak tester.
Refer to the items 3 and 4.
Evacuate and charge system
and then check it for leaks with
a leak tester.
Refer to the items 5 and 6.
Discharge excess charge of
refrigerant to adjust it to a
specified charge.
NO CORRECTION NEEDED
BECAUSE CHARGE OF
REFRIGERANT IS NORMAL.