Expansion Valve: Testing and Inspection
1. CHECK QUANTITY OF GAS DURING REFRIGERATION CYCLE2. INSTALL MANIFOLD GAUGE SET
Refrigerant System With Manifold Gauge Set
3. RUN ENGINE
Run the engine at 1,500 rpm for at least 5 minutes.
Then check that the high pressure reading is 1.37 - 1.57 MPa (14 - 16 kg/Sq.cm, 199 - 228 psi).
4. CHECK EXPANSION VALVE
If the expansion valve is faulty, the low pressure reading will drop to 0 kPa (0 kg/Sq.cm, 0 psi).
HINT: When the low pressure drops to 0 kPa (0 kg/ cm2, 0 psi), feel the receiver's IN and OUT sides for zero temperature difference.