
TROUBLESHOOTING
Symptom
Problem
Solution
Section
Low refrigerant level
Add refrigerant. Contact Dealer.
Clutch coil burned out or
disconnected
Blower motor disconnected or
burned out
Contact Dealer.
Switch contacts in thermostat
burned excessively, or sensing
element defective
Replace thermostat.
Compressor partially or
completely seized
Remove compressor for service or
replacement.
Contact Dealer
Condenser
fi
ns plugged
Clean condenser.
Air Conditioning
Condenser, page
329
Loose or broken compressor
drive belt
Replace drive belt and/ or tighten to
speci
fi
cations.
Tensioning Air
Conditioner (A/C)
Compressor Belt,
page 367
and
Replacing Air
Conditioner (A/C)
Compressor Belt,
page 367
Dirty
fi
lters
Clean fresh air and recirculation
fi
lters.
Cleaning Engine
Air Filter Primary
Element, page
343
and
Cleaning
Return Air Cleaner,
page 328
Broken or disconnected
electrical wire
Check all terminals for loose
connections; check wiring for hidden
breaks.
Broken or disconnected ground
wire
Check ground wire to see if loose,
broken, or disconnected.
—
Expansion valve stuck in open
or closed position
Broken refrigerant line
Leak in system
Compressor shaft seal leaking
Air conditioning not
cooling
Clogged screen in
receiver-drier; plugged hose or
coil
Contact Dealer.
Contact Dealer
147649
443
Revision A
Summary of Contents for M155
Page 3: ...Declaration of Conformity Figure 1 Declaration of Conformity Page 1 of 2 147649 i Revision A ...
Page 4: ...Figure 2 Declaration of Conformity Page 2 of 2 147649 ii Revision A ...
Page 30: ...SAFETY Figure 1 21 Safety Signs Left Cab forward Side 147649 14 Revision A ...
Page 32: ...SAFETY Figure 1 23 Safety Signs Right Cab forward Side 147649 16 Revision A ...
Page 44: ......
Page 54: ......
Page 320: ......
Page 414: ...MAINTENANCE AND SERVICING Fuse Box Decal Figure 5 178 Fuse Decal 147649 398 Revision A ...
Page 468: ......
Page 509: ......