wsm M6040 Workshop Manual page 548

M6040, M7040, 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 0.10 MPa (0.5 to 1.0 kgf/cm
HI pressure side (2)
0.69 to 0.98 MPa (7 to 10 kgf/cm
• 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)
0.20 to 0.35 MPa (2.0 to 3.5 kgf/cm
HI pressure side (2)
1.96 to 2.45 MPa (20 to 25 kgf/cm
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-25.)
• 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
10-S14
2
, 7.1 to 14.2 psi)
2
, 99.6 to 142.2 psi)
(2) HI Pressure Side
9Y1210143CAS0019US0
2
, 28.4 to 49.8 psi)
2
, 284.5 to 355.6 psi)
(2) HI Pressure Side
9Y1210143CAS0020US0
KiSC issued 07, 2012 A
CABIN