Suzuki RA410, Manual

Page: 58 / 761

QUICKLY CHECKING OF REFRIGERANT
CHARGE
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 (1) on receiver/dryer
outlet pipe (2) and compare what is observed with the symptoms
listed in “CHECKING REFRIGERANT CHARGE” table given below.
1
2
1
3. Bubbles
1B-6 AIR CONDITIONING (OPTIONAL)
CHECKING REFREGERANT CHARGE
Item
No.
Symptom Charge of refrigerant Correction
1 Bubbles observed in sight glass Insufficient charge of refrigerant
in system
Check system for leaks with a
leak tester.
2 No bubbles observed in signt glass No or insufficient charge of
refrigerant in system
Refer to the items 3 and 4.
3 No temperature difference between
compressor inlet and outlet
Empty or nearly empty system Evacuate and charge system
and then check it for leaks with
a leak tester.
4 Noticeable temperature difference
between compressor inlet and
outlet
Proper or too much charge of
refrigerant in system
Refer to the items 5 and 6.
5 When A/C is turned OFF,
refregerant in sight glass clears
immediately and remains clear
Too much charge of refrigerant
in system
Discharge excess charge of re-
frigerant to adjust it to a speci-
fied charge.
6 When A/C is turned OFF,
refregerant in sight glass once
produces bubbles and then clears
Proper charge of refrigerant in
system
NO CORRECTION NEEDED
BECAUSE CHARGE OF RE-
FRIGERANT IS NORMAL.