wsm L503 Workshop Manual page 580

L3130 · L3430 · L3830 · L4630 · L5030, WSM
Insufficient Refrigerant
1. Symptoms seen in refrigerating cycle
- Both LO and HI pressure side (1), (2) pressures too low.
LO pressure side (1) : 0.05 to 0.1 MPa
HI pressure side (2) : 0.69 to 0.98 MPa
- Bubbles seen in sight glass.
- Air discharged from air conditioner sightly cold.
2. Probable cause
- Gas leaking from some place in refrigerant cycle.
3. Solution
- Check for leakage with electric gas leak tester (see page 10-
S11) and repair.
- Recharge refrigerant to the proper level. (See page 10-S21.)
(1) LO Pressure Side
Excessive Refrigerant or Insufficient Condenser Cooling
1. Symptoms seen in refrigerating cycle
- Both LO and HI pressure side (1), (2) pressures too high.
LO pressure side (1) : 0.2 to 0.35 MPa
HI pressure side (2) : 1.96 to 2.45 MPa
2. Probable cause
- Overcharging refrigerant into cycle.
- Condenser cooling faulty.
3. Solution
- Clean condenser. (See page G-31.)
- Adjust air conditioner belt to proper tension. (See page G-29.)
- If the above two items are in normal condition, check refrigerant
quantity. (See page 10-S21.)
NOTE
• If excessive refrigerant is to be discharged, loosen manifold
gauge LO pressure side valve and vent out slowly.
(1) LO Pressure Side
Air Entered in the Cycle
1. Symptoms seen in refrigerating cycle
- Both LO and HI pressure side (1), (2) pressures too high.
LO pressure side (1) : 0.2 to 0.35 MPa
HI pressure side (2) : 1.96 to 2.45 MPa
- LO pressure side (1) piping not cold when touched.
2. Probable cause
- Air entered in refrigerating cycle.
3. Solution
- Replace receiver.
- Check compressor oil contamination and quantity.
- Evacuate and recharge new refrigerant. (See page 10-S19,
S20.)
NOTE
• The above cycle can be seen when the cycle is charged
without evacuation.
(1) LO Pressure Side
10-S14
2
(0.5 to 1.0 kgf/cm , 7.1 to 14.2 psi)
2
(7 to 10 kgf/cm , 99.6 to 142.2 psi)
(2) HI Pressure Side
2
(2.0 to 3.5 kgf/cm , 28 to 49.8 psi)
2
(20 to 25 kgf/cm , 284.5 to 355.6 psi)
(2) HI Pressure Side
2
(2.0 to 3.5 kgf/cm , 28 to 49.8 psi)
2
(20 to 25 kgf/cm , 284.5 to 355.6 psi)
(2) HI Pressure Side
CABIN
W1016070
W1016402
W1016771
KiSC issued 02, 2007 A