Kubota M9540, Workshop Manual

Page: 565 / 619

10-S1
M8540, M9540, WSM CABIN
1. TROUBLESHOOTING
COMPRESSOR
W1013580
AIR CONDITIONING SYSTEM
W1013718
Symptom Probable Cause Solution
Reference
Page
Noisy
(Compressor ON) Bearing of compressor worn or damaged Replace 10-S43
Valves in compressor damaged Replace 10-S43
Belt slipping Adjust or replace G-31
Compressor bracket mounting screws loosen Tighten –
Piping resonant Tighten or add clamp –
Noisy
(Compressor OFF) Blower defective Repair or replace 10-S27, 45
Bearings of magnetic clutch, idle pulley or crank
pulley worn or damaged Replace 10-S22
Does Not Cool
(No Air Flow) Fuse blown Replace –
A/C compressor relay defective Replace 9-S42
A/C blower motor defective Replace 10-S27, 45
A/C blower switch defective Replace 10-S24
Wiring harness disconnected or improperly
connected Repair –
Does Not Cool
(Compressor Does
Not Rotate) Fuse blown Replace 9-S11
Magnetic clutch defective Repair or replace 10-S22
A/C switch defective Replace 10-S25
Pressure switch defective Replace 10-S30
Belt slipping Adjust or replace G-31
Does Not Cool
(Others) Insufficient refrigerant Check with manifold
gauge 10-S21
Expansion valve defective Replace –
Compressor defective Replace 10-S43
Insufficient Cooling
(Insufficient Air
Flow) Air filter clogged Clean or replace G-30
Evaporator frosted Clean or replace
thermo switch –
A/C blower motor defective Replace 10-S27, 45
A/C blower resistor defective Replace 10-S27, 45
Insufficient Cooling
(Many Bubbles in
Sight Glass) Insufficient refrigerant Check with manifold
gauge 10-S21
Gas leaking from some place in refrigerating
cycle Repair and charge
refrigerant 10-S13
Air mixed in Check with manifold
gauge 10-S15
Insufficient Cooling
(No Bubbles in Sight
Glass) Too much refrigerant Check with manifold
gauge 10-S21
KiSC issued 09, 2008 A