wsm M7040 - Page 548

CABIN
M6040, M7040, WSM
10-S14
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
2
, 7.1 to 14.2 psi)
HI pressure side (2)
0.69 to 0.98 MPa (7 to 10 kgf/cm
2
, 99.6 to 142.2 psi)
• 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.)
9Y1210143CAS0019US0
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
2
, 28.4 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)
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.
9Y1210143CAS0020US0
(1) LO Pressure Side (2) HI Pressure Side
(1) LO Pressure Side (2) HI Pressure Side
KiSC issued 07, 2012 A