Suzuki WagonR+ RB310 Service Manual page 2088

DIAGNOSIS TEST TABLE
TESTING RESULTS
Pressure high
("A" area of high side
graph)
Pressure low
("B" area of high side
graph)
Pressure high
("A" area of high side
graph)
Pressure low
("B" area of high side
graph)
Outlet air temperature
at center duct is high
(Crossing point is in
area "A")
Outlet air temperature
at center duct is low
(Crossing point is in
area "B")
If ambient temperature is within 30 – 35_C (86 – 95_F), it is possible to do using next page table for detail diagnosis.
POSSIBLE CAUSE
D Refrigerant overcharged
D Expansion valve frozen or clogged
D Clogged refrigerant passage of high side
D Condenser fan malfunction
D Dirty or bent condenser fins
D Compressor malfunction (Insufficient oil etc.)
D Engine overheat
D Insufficient refrigerant (Insufficient charge or
leakage)
D Expansion valve malfunction (valve opens too
wide)
D Compressor malfunction (Insufficient
compression)
D Expansion valve malfunction (valve opens too
wide)
D Compressor malfunction (Insufficient
compression)
D Insufficient refrigerant (Insufficient charge or
leakage)
D Expansion valve malfunction (valve opens too
narrow)
D Clogged refrigerant passage (crashed pipe)
D Insufficient or excessive charge of refrigerant
D Dirty or bent evaporator fins
D Air leakage from cooling (heater) unit or air duct
D Malfunctioning, switchover function of damper
in cooling (heater) unit
D Compressor malfunction
D Insufficient air volume from center duct (Heater
blower malfunction)
D Compressor malfunction
AIR CONDITIONING (OPTIONAL) 1B-9
REMEDY
D Recharge
D Check expansion valve
D Clean or replace
Insufficient D Check condenser fan
cooling of
condenser D Clean or repair
D Check compressor
D Check engine cooling
system
D Check for leakage, repair
if necessary and
recharge
D Check expansion valve
D Check compressor
D Check expansion valve
D Check compressor
D Check for leakage, repair
if necessary and
recharge
D Check expansion valve
D Repair or replace
D Check refrigerant
pressure
D Clean or repair
D Repair or replace
D Repair or replace
D Check compressor
D Check blower motor and
fan
D Check compressor