wsm ME8200, Workshop Manual

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10-S17
ME8200, ME9000, WSM CABIN
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
(2.0 to 3.5 kgf/cm
2
, 28 to 49.8 psi)
HI pressure side (2) : 1.96 to 2.45 MPa
(20 to 25 kgf/cm
2
, 284.5 to 355.6 psi)
- 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-S20,
S21.)
NOTE
■
• The above cycle can be seen when the cycle is charged
without evacuation.
W1016771
Moisture Entered in the Cycle
1. Symptoms seen in refrigerating cycle
- The air conditioner operates normally at the beginning, but over
time, LO pressure side (1) pressure is vacuum and HI
pressure side (2) is low pressure.
LO pressure side (1) : Vacuum
HI pressure side (2) : 0.69 to 0.98 MPa
(7 to 10 kgf/cm
2
, 99.6 to 142.2 psi)
2. Probable cause
- The moisture in the refrigerating cycle freezes in the expansion
valve orifice and causes temporary blocking. After a time, the
ice melts and condition returns to normal.
3. Solution
- Replace receiver.
- Remove moisture in cycle by means of repeated evacuation.
(See page 10-S20.)
- Recharge new refrigerant to the proper level. (See page 10-
S21.)
W1017013
(1) LO Pressure Side (2) HI Pressure Side
(1) LO Pressure Side (2) HI Pressure Side
KiSC issued 03, 2007 A