Expansion Valve: Testing and Inspection
1. CHECK GAS QUANTITY DURING REFRIGERATION CYCLE2. INSTALL 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 kgf/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 kgf/sq.cm. 0 psi). otherwise it is OK.
HINT: When the low pressure drops to 0 kPa (0 kgf/ sq.cm. 0 psi), check that there is no temperature difference between the receiver's IN and OUT side.