Suzuki SWIFT RS415 2017, Руководство по обслуживанию

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Air Conditioning System: 7B-12
High pressure gauge
Low pressure gauge
11) Check inlet port temperature-to-outlet port temperature relationship using the graph. For example, if temperature
near air inlet of HVAC unit is 30
q
C (86
q
F) and the one at air outlet of center ventilation louver is 17
q
C (62.6
q
F),
their crossing point is within acceptable range as shown in the graph. In this case, cooling performance is
satisfactory and proper.
12) If crossing point is out of acceptable range, diagnose trouble referring to the following table.
Condition Possible cause Correction
Pressure is higher than
acceptable range
(“A” area) Refrigerant overcharged Recharge.
Expansion valve frozen or clogged Check expansion valve.
Clogged refrigerant passage of high pressure side Clean or replace.
Radiator cooling fan malfunction (Insufficient
cooling of condenser)
Check radiator cooling fan.
Dirty or bent condenser fins (Insufficient cooling of
condenser) Clean or repair.
Compressor malfunction (Insufficient oil etc.) Check compressor.
Engine overheat Check engine cooling system
referring to “Engine Cooling Symptom
Diagnosis: in Section 1F”.
Pressure is lower than
acceptable range
(“B” area) Insufficient refrigerant (Insufficient charge or
leakage) Check for leakage, repair if necessary
and recharge.
Expansion valve malfunction (valve opens too
wide) Check expansion valve.
Compressor malfunction (Insufficient
compression) Check compressor.
Condition Possible cause Correction
Pressure is higher than
acceptable range
(“C” area) Expansion valve malfunction (valve opens too
wide) Check expansion valve.
Compressor malfunction (Insufficient
compression) Check compressor.
Pressure is lower than
acceptable range
(“D” area) Insufficient refrigerant (Insufficient charge or
leakage) Check for leakage, repair if necessary
and recharge.
Expansion valve malfunction (valve opens too
narrow) Check expansion valve.
Clogged refrigerant passage (crashed pipe) Repair or replace.