Refrigerant Pressure With Manifold Gauge Set - Subaru FORESTER2001 Service Manual

REFRIGERANT PRESSURE WITH MANIFOLD GAUGE SET

HVAC System (Heater, Ventilator and A/C)
2. Refrigerant Pressure with Manifold Gauge Set
A: OPERATION
1) Place the vehicle in the shade and draftless condition.
2) Connect the manifold gauge set.
3) Open the front windows and close all doors.
4) Open the hood.
5) Increase engine rpm to 1,500.
6) Turn ON the A/C switch.
7) Turn the temperature control switch to MAX COOL.
8) Put in RECIRC position.
9) Turn the blower control switch to HI.
10) Read the gauge.
Standard:
Low pressure: 127 - 196 kPa (1.3 - 2.0 kg/cm
High pressure: 1,471 - 1,667 kPa (15 - 17 kg/cm
Ambient temperature: 30 - 35 °C (86 - 95 °F)
B: INSPECTION
Symptom
High-pressure side is unusually high.
High-pressure side is unusually low.
Low-pressure side is unusually high.
Low-pressure side is unusually low.
S701631A16
S701631A10
¼ Defective condenser fan motor
¼ Clogged condenser fan
¼ Too much refrigerant
¼ Air inside the system
¼ Defective receiver dryer
¼ Defective compressor
¼ Not enough refrigerant
¼ Clogged expansion valve
¼ Expansion valve frozen temporarily by
moisture
¼ Defective compressor
¼ Defective expansion valve
¼ Too much refrigerant
¼ Not enough refrigerant
¼ Clogged expansion valve
¼ Expansion valve frozen temporarily by
moisture
¼ Saturated receiver dryer
2
, 18 - 28 psi)
2
, 213 - 242 psi)
Probable cause
AC-18
S701631
Repair order
¼ Replace the fan motor.
¼ Clean the condenser fin.
¼ Discharge refrigerant.
¼ Replace the receiver dryer.
¼ Replace the compressor.
¼ Check for leaks.
¼ Replace the expansion valve.
¼ Replace the compressor.
¼ Replace the expansion valve.
¼ Discharge refigerant.
¼ Check for leaks.
¼ Replace the expansion valve
¼ Replace the receiver dryer.