Refrigerant Charge Check
REFRIGERANT CHARGE CHECK1. Install the manifold gauge set.
2. Inspect the refrigerant pressure reading with the engine stopped.
3. Verity that the high- and low-pressure side readings of the manifold gauge are at 493 - 788 kPa (5.02 - 8.04 kg/sq.cm, 72 - 114 psi).
- If the pressure readings are lower than specified, recharge the refrigerant amount.
- If the pressure readings are within the specification but there is insufficient cooling, go to the next step.
- If the pressure readings are within the specification and there is no leakage, the refrigerant amount is OK.
4. Start the engine and run it at a constant 2000 rpm.
5. Turn the A/C switch on and set the fan switch at 4th.
6. Set the RECIRCULATE mode.
- If the A/C compressor is short-cycling, then go to next step.
7. Verify the low-pressure side reading at which the magnetic clutch kicks out.
- If the pressure is 170 kPa (1.7 kg/sq.cm, 24 psi) or lower, evacuate then recharge the refrigerant system with the proper amount of refrigerant.
- If the pressure is 210 kPa (2.1 kg/sq.cm, 30 psi) or higher, inspect the thermoswitch.