Troubleshooting - Kubota WSM B2050 Workshop Manual

B2050, B2350, B2650, B3150, WSM

1. TROUBLESHOOTING

COMPRESSOR
Symptom
Noisy
(Compressor ON)
Noisy
(Compressor OFF)
AIR CONDITIONING SYSTEM
Symptom
Does Not Cool
(No Air Flow)
Does Not Cool
(Compressor Does
Not Rotate)
Does Not Cool
(Others)
Insufficient Cooling
(Insufficient Air Flow)
Probable Cause and Checking Procedure
1. Bearing of compressor worn or damaged
2. Valves in compressor damaged
3. Belt slipping
4. Compressor bracket mounting screws loosen
5. Piping resonant
1. Blower damaged
2. Bearings of magnetic clutch, idle pulley or
crank pulley worn or damaged
Probable Cause and Checking Procedure
1. Fuse blown
2. A/C compressor relay damaged
3. A/C blower relay damaged
4. A/C blower motor damaged
5. A/C blower switch damaged
6. Wiring harness disconnected or improperly
connected
1. Fuse blown
2. Magnetic clutch damaged
3. A/C switch damaged
4. Pressure switch damaged
5. Belt slipping
1. Insufficient refrigerant
2. Expansion valve damaged
3. Compressor damaged
1. Air filter clogged
2. Evaporator frosted
3. A/C blower motor damaged
4. A/C blower resistor damaged
Replace compressor
Replace compressor
Adjust or replace
V-belt
Tighten screws
Tighten or add clamp
Repair or replace
blower
Replace compressor
Replace fuse
Replace relay
Replace relay
Replace blower motor
Replace blower
switch
Repair wiring harness
Replace fuse
Repair or replace
compressor
Replace A/C switch
Replace pressure
switch
Adjust or replace
V-belt
Check with manifold
gauge
Replace expansion
valve
Replace compressor
Clean or replace air
filter
Clean evaporator
Replace A/C blower
motor
Replace A/C blower
resistor
10-S1
CABIN
Reference
Solution
Page
10-S36
10-S36
10-S22
10-S36
10-S41
10-S25
10-S36
Reference
Solution
Page
G-40
9-S11
9-S11
10-S26
10-S23
9-M1 to
9-M3
G-40
10-S36
10-S23
10-S28
10-S22
10-S13
10-M8
10-S36
G-32
10-M9
10-S26
10-S25
KiSC issued 03, 2014 A