Kubota ME5700, Workshop Manual

Page: 471 / 508

ME5700, WSM CABIN
10-S16
Insufficient Refrigerant
1. Symptoms seen in refrigerating cycle
A
Both LO and HI pressure side (1), (2) pressures too low.
LO pressure side (1) : 0.05 to 0.1 MPa
(0.5 to 1.0
, 7.1 to 14.2 psi)
HI pressure side (2) : 0.69 to 0.98 MPa
(7 to 10
, 99.6 to 142.2 psi)
A
Bubbles seen in sight glass.
A
Air discharged from air conditioner sightly cold.
2. Probable cause
A
Gas leaking from some place in refrigerant cycle.
3. Solution
A
Check for leakage with electric gas leak tester (see page 10-
S13) and repair.
A
Recharge refrigerant to the proper level. (See page 10-S23.)
Excessive Refrigerant or Insufficient Condenser Cooling
1. Symptoms seen in refrigerating cycle
A
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
, 28 to 49.8 psi)
HI pressure side (2) : 1.96 to 2.45 MPa
(20 to 25
, 284.5 to 355.6 psi)
2. Probable cause
A
Overcharging refrigerant into cycle.
A
Condenser cooling faulty.
3. Solution
A
Clean condenser. (See page G-27.)
A
Adjust air conditioner belt to proper tension. (See page G-28.)
A
If the above two items are in normal condition, check
refrigerant quantity. (See page 10-S23.)
A
If excessive refrigerant is to be discharged, loosen
manifold gauge LO pressure side valve and vent out
slowly.
(1) LO Pressure Side (2) HI Pressure Side
0000003010E
(1) LO Pressure Side (2) HI Pressure Side
0000003011E
KiSC issued 04, 2006 A