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REFRIGERATION SYSTEM SYMPTOMS HA-9 < SYMPTOM DIAGNOSIS > [VQ35HR] C D E F G H J K L M A B HA N O P High-pressure side is too low and High- and low-pressure sides Compressor pressure opera- ↓ Damaged inside compressor Replace compressor. No temperature difference be- Compressor pressure opera- ↓ Damaged inside compressor Replace compressor. Both high- and low-pressure sides • There is a big temperature difference between liquid • Liquid tank inlet and expan- sion valve are frosted. Liquid tank inside is slightly • Replace liquid tank. nation. • Expansion valve inlet tem- perature is extremely low • Expansion valve inlet is frosted. • Temperature difference oc- curs somewhere in high- High-pressure pipe located be- • Check and repair malfunc- tioning parts. • Check lubricant for contami- nation. Expansion valve and liquid Low refrigerant charge. ↓ Leaking fittings or components. Check refrigerant for leakages. . There is a big temperature dif- Expansion valve closes a little ↓ 1. Improper expansion 2. Malfunctioning expansion 3. Outlet and inlet may be • Remove foreign particles by using compressed air. • Replace expansion valve. nation. An area of the low-pressure Low-pressure pipe is clogged • Check and repair malfunc- tioning parts. • Check lubricant for contami- nation. Air flow volume is not enough Evaporator is frozen. • Check intake sensor circuit. Refer to . • Replace compressor. Refer to . Gauge indication Refrigerant cycle Probable cause Corrective action AC356A AC353A |