Suzuki SY413 Service Manual page 1451

Use the following table when checking charged state of refrigerant and correct it as necessary.
Item
Symptom
No.
Bubbles observed in sight glass
1
No bubbles observed in sight
2
glass
No temperature difference be-
3 tween compressor inlet and outlet
Noticeable temperature difference
4 between compressor inlet and
outlet
When A/C is turned OFF, refriger-
5 ant in sight glass clears immedi-
ately and remains clear
When A/C is turned OFF, refriger-
6 ant in sight glass once produces
bubbles and then clears
REFRIGERATING SYSTEM
1. Receiver/Dryer
2. Sight glass
3. Bubbles A. CHARGE OF REFRIGERANT
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 max. cooling capacity
for a few minutes. Then, look at the sight glass on receiver/dryer
to check charge of refrigerant.
Charge of refrigerant
Insufficient charge of refrigerant
in system
No or insufficient charge of refrig-
erant in system
Empty or nearly empty system
Proper or too much charge of re-
frigerant in system
Too much charge of refrigerant in
system
Proper charge of refrigerant in
system
AIR CONDITIONING (OPTIONAL) 1B-17
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 re-
frigerant to adjust it to a specified
charge.
NO CORRECTION NEEDED BE-
CAUSE CHARGE OF REFRIG-
ERANT IS NORMAL.