MacDon 9250 SP - Manual (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