Quickly Checking Of Refrigerant Charge (If Equipped With Sight Glass) - Suzuki GRAND VITARA XL-7 Owner's Manual

2
1
Condition
Bubbles observed in sight
glass
No bubbles observed in
sight glass
No temperature differ-
ence between compressor
inlet and outlet
Noticeable temperature
difference between com-
pressor inlet and outlet
When A/C is turned OFF,
refrigerant in sight glass
clears immediately and
remains clear
When A/C is turned OFF,
refrigerant in sight glass
once produces bubbles
and then clears
NOTE:
For specified amount of refrigerant, refer to "OPERATION PROCEDURE FOR CHARGING A/C WITH
REFRIGERANT" in this section.
Quickly Checking of Refrigerant Charge (If
Equipped with Sight Glass)
The following procedure can be used for quickly checking whether
the A/C system has a proper charge of refrigerant or not.
1) Run engine at fast idle.
2) Operate A/C at the following conditions for a few minutes.
• Main (front) A/C switch at ON position.
• Rear A/C main switch at ON position (if equipped).
• Front blower motor switch at max position.
• Rear blower motor switch at max position (if equipped).
• Air outlet control button at face position.
• Temperature control lever at max cool position.
• Vehicle door at all open.
• Air inlet door at recirculation position.
3) Look at the sight glass (1) and compare what is observed
2. Bubbles
Possible Cause
Insufficient charge of refrigerant in system
No charge or proper or too much 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
with the symptoms listed in the table given below.
AIR CONDITIONING (OPTIONAL) 1B-9
Correction
Check system for leaks with a leak tester.
Refer to the following items.
Perform recovery, evacuating and charg-
ing system and then check it for leaks
with a leak tester.
Refer to the following items.
Recharge with specified amount of refrig-
erant.
Perform "PERFORMANCE DIAGNOSIS"
in this section.