wsm L503 Workshop Manual page 582

L3130 · L3430 · L3830 · L4630 · L5030, WSM
Expansion Valve Opens Too Far or Improper Installation of
Heat Sensitizing Tube
1. Symptoms seen in refrigerating cycle
- Both LO and HI pressure side (1), (2) pressures too high.
LO pressure side (1) : 0.29 to 0.39 MPa
HI pressure side (2) : 1.96 to 2.45 MPa
- Frost or heavy dew on low pressure side piping.
2. Probable cause
- Expansion valve trouble or heat sensitizing tube improperly
installed.
- Flow adjustment not properly done.
3. Solution
- Check installed condition of heat sensitizing tube.
- If installation of heat sensitizing tube is correct, replace the
expansion valve.
(1) LO Pressure Side
Faulty Compression of Compressor
1. Symptoms seen in refrigerating cycle
- LO pressure side (1) pressure too high : 0.39 to 0.59 MPa (4 to
2
6 kgf/cm , 56.9 to 85.3 psi)
- HI pressure side (2) pressure too low : 0.69 to 0.98 MPa (7 to
2
10 kgf/cm , 99.6 to 142.2 psi)
2. Probable cause
- Leak in compressor.
3. Solution
- Replace compressor. (See page 10-S29.)
NOTE
• Manifold gauge indications (left side figure) at faulty
compressing by compressor.
(1) LO Pressure Side
10-S16
2
(3.0 to 4.0 kgf/cm , 42.71 to 56.9 psi)
2
(20 to 25 kgf/cm , 284.5 to 355.6 psi)
(2) HI Pressure Side
(2) HI Pressure Side
CABIN
W1017612
W1017960
KiSC issued 02, 2007 A