wsm M7060 - Page 596

CABIN
M6060, M7060, WSM
9-S14
Insufficient Refrigerant
1. Symptoms seen in refrigerating cycle
• Both LO and HI pressure side (1), (2) pressures too low.
LO pressure side (1):
0.049 to 0.098 MPa (0.50 to 1.0 kgf/cm
2
, 7.2 to 14 psi)
HI pressure side (2):
0.69 to 0.98 MPa (7.0 to 10 kgf/cm
2
, 100 to 140 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
9-S11) and repair.
• Recharge refrigerant to the proper level. (See page 9-S20.)
9Y1210828CAS0019US0
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 0.34 MPa (2.0 to 3.5 kgf/cm
2
, 29 to 49 psi)
HI pressure side (2):
2.0 to 2.4 MPa (20 to 25 kgf/cm
2
, 290 to 350 psi)
2. Probable cause
• Overcharging refrigerant into cycle.
• Condenser cooling faulty.
3. Solution
• Clean condenser. (See page 9-S8.)
• Adjust air conditioner belt to proper tension. (See page
G-28.)
• If the above two items are in normal condition, check
refrigerant quantity. (See page 9-S22.)
NOTE
• If excessive refrigerant is to be discharged, loosen
manifold gauge LO pressure side valve and vent out
slowly.
9Y1210828CAS0020US0
(1) LO Pressure Side (2) HI Pressure Side
(1) LO Pressure Side (2) HI Pressure Side
KiSC issued 08, 2013 A