MacDon 9250 SP - Manual (Page 119)

Form # 46584 Issue 11/06 Web Rev_01 117
TROUBLE SHOOTING
SYMPTOM
PROBLEM SOLUTION REF.
Cab Air System See page 112 for possible causes of abnormal high side / low side pressure.
Blower fan will not run.
Burned out motor. Replace motor. *
Burned out switch. Replace switch. *
Motor shaft tight or
bearings worn. Repair motor. *
Faulty wiring - loose or
broken. Repair or replace wiring. *
Blower rotors in contact
with housing. Replace rotors and/or
housing. *
Blower fan operating but
no air coming into cab. Dirty fresh air filter.
Evaporator clogged. Clean filter.
Clean evaporator. 110
111
Air flow passage
blocked. Remove blockage. ---
Heater not heating. Heater shut-off valve at
engine closed. Open valve. 21
Defective thermostat in
engine water outlet
manifold. Replace thermostat. *
Heater temperature
control defective. Replace control. *
No thermostat in engine
water outlet manifold. Install thermostat. *
Odour from air louvers. Plugged drainage hose. Blow out hose with
compressed air. ---
Dirty filters. Clean filters. 110, 111
Air conditioning not
cooling. Low refrigerant level. Add refrigerant *
Switch contacts in
thermostat burned
excessively, or sensing
element defective. Replace thermostat. *
Clutch coil or relay
burned out or
disconnected. Check current flow to
clutch or relay. Replace
if inoperative. *
Condenser fins plugged. Clean condenser. 79
Blower motor discon-
nected or burned out. Check current flow to
blower motor. Repair or
replace if inoperative. *
* See your Windrower Dealer.