MacDon 9250 - Page 120

Form # 46584 Issue 11/06 Web Rev_01
118
TROUBLE SHOOTING
SYMPTOM
PROBLEM SOLUTION REF.
Air conditioning not
cooling. (continued)
Loose or broken drive
belt.
Replace drive belt and/
or tighten to specs.
66
Compressor partially or
completely seized.
Remove compressor for
service or replacement.
*
Dirty filters. Clean fresh air and re-
circulation filters.
110, 111
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.
Replace expansion
valve.
*
Broken refrigerant line. Examine all lines for
evidence of breakage
by external stress or
rubbing wear.
*
Leak in system. Leak-test system; repair
leaks as necessary.
*
Compressor shaft seal
leaking.
Replace compressor
shaft seal.
*
Clogged screen in
receiver-drier; plugged
hose or coil.
Repair as necessary.
Replace receiver-drier;
evacuate and charge.
*
Air conditioning not
producing sufficient
cooling. (Sufficient
cooling defined as when
air temperature in cab,
measured at louvered
vent, can be maintained
at 25°F (14°C) below
ambient air
temperature.)
Compressor clutch
slipping.
Clogged air filter.
Heater circuit is open.
Too little air circulation
over condenser coil; fins
clogged with dirt or
insects.
Remove clutch
assembly for service or
replacement.
Remove air filter and
clean or replace as
necessary.
Close heater valves
(1 in cab, 1 at engine).
Clean condenser.
*
110
21
79
Evaporator fins clogged. Clean evaporator fins
(under seat)
111
Too little refrigerant in
system.
Recharge system until
gauge readings stabilize
to specifications.
112
* See your Windrower dealer