Suzuki Liana RH413, Service Manual

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Air Conditioning System: Manual Type 7B-22
Repair Instructions
Quick Checking of Refrigerant Charge
S3RH0A7216001
The following procedure can be used for quickly checking whether the A/C system has a proper amount of refrigerant
or not.
Run engine at fast idle and operate A/C system at its maximum cooling capacity for a few minutes.
Then, look at the sight glass (1) on condenser outlet pipe (2) and compare what is observed with the symptoms listed
in the table.
Checking Refrigerant Charge
NOTE
Charge proper amount of refrigerant referring to “Operation Procedure for Refrigerant Charging”, if
necessary.
G04-20 ORN
Sensor ground
for A/C
evaporator inlet
and outlet air
temperature
sensors
Ground to body
(Fig A)
–0.5 – 0.5 V Engine running
G03-10 BLU/BLK
Blower speed
input Ground to
engine (Fig B)
10 – 14 V
Ignition switch ON, Blower speed
selector OFF, 1st or 2nd position
about 2.0 V
Ignition switch ON, Blower speed
selector between 3rd and HIGH position
Terminal Wire Color Circuit
Measurement
Ground
Normal Value Condition
Step Action Yes No
1 Are there any bubbles (3) in sight glass? Insufficient amount of
refrigerant in A/C
system. Charge proper
amount of refrigerant. Go to Step 2.
2 Is there a difference in temperature between compressor
inlet pipe and compressor outlet pipe? Go to Step 3. Empty or nearly empty
of refrigerant on A/C
system. Charge proper
amount of refrigerant.
3 Are any bubbles (3) produced in sight glass for a while (not
immediately), and then become clear when A/C is turned
OFF? Proper amount of
refrigerant in A/C
system. Too much amount of
refrigerant in A/C
system. Charge proper
amount of refrigerant.
4. A/C refrigerant pressure switch
I2RH01720005-01