Kubota WSM L3560, Workshop Manual

Page: 758 / 801

CABIN
L3560, L4060, L4760, L5060, L5460, L6060, WSM
10-S15
Air Entered in the Cycle
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)
•
LO
pressure side (1) piping not cold when touched.
2. Probable cause
• Air entered in refrigerating cycle.
3. Solution
• Replace receiver.
• Check compressor oil contamination and quantity.
• Evacuate and recharge new refrigerant. (See page 10-S19.)
NOTE
• The above cycle can be seen when the cycle is charged
without evacuation.
9Y1210824CAS0035US0
Moisture Entered in the Cycle
1. Symptoms seen in refrigerating cycle
• The air conditioner operates normally at the beginning, but
over time,
LO
pressure side (1) pressure is
vacuum
and
HI
pressure side (2) is low pressure.
LO
pressure side (1)
Vacuum
HI
pressure side (2)
0.69 to 0.98 MPa (7 to 10 kgf/cm
2
, 99.6 to 142.2 psi)
2. Probable cause
• The moisture in the refrigerating cycle freezes in the
expansion valve orifice and causes temporary blocking.
After a time, the ice melts and condition returns to normal.
3. Solution
• Replace receiver.
• Remove moisture in cycle by means of repeated
evacuation.
• Recharge new refrigerant to the proper level. (See page
10-S19.)
9Y1210824CAS0036US0
(1)
LO
Pressure Side (2)
HI
Pressure Side
(1)
LO
Pressure Side (2)
HI
Pressure Side
KiSC issued 03, 2016 A