Performance Diagnosis Table; High Pressure Gauge; Low Pressure Gauge; Thermometer At Center Duct - Suzuki Ignis Service Manual

1B-12 AIR CONDITIONING (OPTIONAL)

PERFORMANCE DIAGNOSIS TABLE

NOTE:
If ambient temperature is approximately 30°C (86°F), it is possible to diagnose A/C system in detail
referring to "DETAIL DIAGNOSIS TABLE (AMBIENT TEMPERATURE AT 30 °C (86°F))" under "PER-
FORMANCE DIAGNOSIS" in this section.

HIGH PRESSURE GAUGE

Condition
Pressure high
("A" area of high side
graph)
Pressure low
("B" area of high side
graph)

LOW PRESSURE GAUGE

Condition
Pressure high
("C" area of low side
graph)
Pressure low
("D" area of low side
graph)

THERMOMETER AT CENTER DUCT

Condition
Outlet air temperature at
center duct is high
(Crossing point is in area
"E")
Outlet air temperature at
center duct is low
(Crossing point is in area
"F")
Possible Cause
Refrigerant overcharged
Expansion valve frozen or clogged
Clogged refrigerant passage of high side
Radiator/condenser cooling fan malfunction (Insufficient
cooling of condenser)
Dirty or bent condenser fins (Insufficient cooling of con-
denser)
Compressor malfunction (Insufficient oil etc.)
Engine overheat
Insufficient refrigerant (Insufficient charge or leakage)
Expansion valve malfunction (valve opens too wide)
Compressor malfunction (Insufficient compression)
Possible Cause
Expansion valve malfunction (valve opens too wide)
Compressor malfunction (Insufficient compression)
Insufficient refrigerant (Insufficient charge or leakage)
Expansion valve malfunction (valve opens too narrow)
Clogged refrigerant passage (crashed pipe)
Possible Cause
Insufficient or excessive charge of refrigerant
Dirty or bent A/C evaporator fins
Air leakage from cooling (heater) unit or air duct
Malfunctioning, switch over function of door in cooling
(heater) unit
Compressor malfunction
Insufficient air volume from center duct (Heater blower
malfunction)
Compressor malfunction
Correction
Recharge.
Check expansion valve.
Clean or replace.
Check radiator/condenser cooling fan.
Clean or repair.
Check compressor.
Check engine cooling system referring to
Section 6B.
Check for leakage, repair if necessary
and recharge.
Check expansion valve.
Check compressor.
Correction
Check expansion valve.
Check compressor.
Check for leakage, repair if necessary
and recharge.
Check expansion valve.
Repair or replace.
Correction
Check refrigerant pressure.
Clean or repair.
Repair or replace.
Repair or replace.
Check compressor.
Check blower motor and fan.
Check compressor.