MacDon M100 SP Operators Manual - Manual (Page 179)

TROUBLESHOOTING
* See your MacDon dealer
** Refer to Windrower Technical Manual
169304
177
Rev. C
58.7 CAB AIR
SYMPTOM PROBLEM SOLUTION SECTION
Blower Fan Will Not Run. Burned out motor.
Contact MacDon dealer. *
Burned out switch.
Motor shaft tight or bearings worn.
Faulty wiring - loose or broken.
Blower rotors in contact with
housing.
Blower Fan Operating But No Air
Coming Into Cab.
Dirty fresh air filter. Clean filter. 7.7.5.1
Dirty recirculating air. Clean filter. 7.7.5.2
Evaporator clogged. Clean evaporator. 7.7.5.4
Air flow passage blocked. Remove blockage. ---
Heater Not Heating. Heater shut-off valve at engine
closed. Open valve.
5.10.1.1
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. 7.7.5.1 &
7.7.5.2
Air Conditioning Not Cooling. Low refrigerant level. Add refrigerant *
Switch contacts in thermostat
burned excessively, or sensing
element defective. Replace thermostat.
**
Clutch coil burned out or
disconnected. Contact MacDon dealer.
*
Condenser fins plugged. Clean condenser. 7.9.2
Blower motor disconnected or
burned out. Contact MacDon dealer.
*
Loose or broken drive belt. Replace drive belt and/ or tighten
to specs.
7.8.8.4
Compressor partially or completely
seized. Remove compressor for service
or replacement.
**
Dirty filters. Clean fresh air and re-circulation
filters. 7.7.5.1 &
7.7.5.2
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.
Contact MacDon dealer. *
Broken refrigerant line.
Leak in system.
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