Repair Instructions; Quick Checking Of Refrigerant Charge - Suzuki Liana RH413 Service Manual

Terminal Wire Color
Sensor ground
for A/C
evaporator inlet
G04-20 ORN
and outlet air
temperature
sensors
Blower speed
G03-10 BLU/BLK
input

Quick Checking of Refrigerant Charge

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
Step
1 Are there any bubbles (3) in sight glass?
2 Is there a difference in temperature between compressor
inlet pipe and compressor outlet pipe?
3 Are any bubbles (3) produced in sight glass for a while (not
immediately), and then become clear when A/C is turned
OFF?
NOTE
Charge proper amount of refrigerant referring to "Operation Procedure for Refrigerant Charging", if
necessary.
Measurement
Circuit
Ground
Ground to body
(Fig A)
Ground to
engine (Fig B)

Repair Instructions

Action
4. A/C refrigerant pressure switch
Air Conditioning System: Manual Type 7B-22
Normal Value
–0.5 – 0.5 V Engine running
Ignition switch ON, Blower speed
10 – 14 V
selector OFF, 1st or 2nd position
Ignition switch ON, Blower speed
about 2.0 V
selector between 3rd and HIGH position
Yes
Insufficient amount of
refrigerant in A/C
system. Charge proper
amount of refrigerant.
Go to Step 3.
Proper amount of
refrigerant in A/C
system.
I2RH01720005-01
Condition
S3RH0A7216001
No
Go to Step 2.
Empty or nearly empty
of refrigerant on A/C
system. Charge proper
amount of refrigerant.
Too much amount of
refrigerant in A/C
system. Charge proper
amount of refrigerant.