|
|
HA-34 < SYMPTOM DIAGNOSIS > [WITH HEAT PUMP SYSTEM] REFRIGERATION SYSTEM SYMPTOMS SYMPTOM DIAGNOSIS REFRIGERATION SYSTEM SYMPTOMS Trouble Diagnosis For Unusual Pressure INFOID:0000000010122113 Diagnose using a manifold gauge whenever system’s high and/or low side pressure(s) is/are unusual. The marker above the gauge scale in the following tables indicates the standard (usual) pressure range. Refer to above table (Ambient air temperature-to-operating pressure table) since the standard (usual) pressure, how- ever, differs from vehicle to vehicle. Symptom Table INFOID:0000000010122114 Gauge indication Refrigerant cycle Probable cause Corrective action Both high and low-pressure sides The pressure returns to nor- Overfilled refrigerant. Collect all refrigerant, evacuate Air flow to condenser is insuf- Insufficient condenser cooling and condenser. • Improper installation of air guide. • Clogged or dirty condenser fins. • Repair or replace malfunc- tioning parts. • Clean and repair condenser fins. When compressor is stopped, 2 , 28.4 psi). It then gradually de- Air mixed in refrigerant cycle. Collect all refrigerant, evacuate High-pressure side is excessively High-pressure pipe and upper Clogged or crushed high-pres- Repair or replace the malfunc- High-pressure side is too low and • The readings of both sides become equal soon after • There is no temperature dif- ference between high- and Malfunction in compressor sys- valve. • Malfunctioning gaskets. Replace compressor. AC359A AC360A AC356A |