MacDon M155 Operators Manual - Manual (Page 417)

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 fins plugged Clean condenser.
Air Conditioning
Condenser, page
288
Loose or broken compressor
drive belt Replace drive belt and/ or tighten to
specifications.
Tensioning A/C
Compressor Belt,
page 325
and
Replacing A/C
Compressor Belt,
page 325
Dirty filters
Clean fresh air and recirculation
filters.
Cleaning Engine
Air Filter Primary
Element, page
301
and Cleaning
Return Air Cleaner,
page 287
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.
169883
401
Revision A