Cab Air - MacDon M150 2008 Operator's Manual

8.7 CAB AIR

SYMPTOM
Blower Fan Will Not Run.
Blower Fan Operating But No Air
Coming Into Cab.
Heater Not Heating.
Odour From Air Louvers.
Air Conditioning Not Cooling.
* See your MacDon dealer
** Refer to Windrower Technical Manual
Form 169017
TROUBLESHOOTING
PROBLEM
Burned out motor.
Burned out switch.
Motor shaft tight or bearings worn.
Faulty wiring - loose or broken.
Blower rotors in contact with
housing.
Dirty fresh air filter.
Dirty recirculating air
Evaporator clogged.
Air flow passage blocked.
Heater shut-off valve at engine
closed.
Defective thermostat in engine
water outlet manifold.
Heater temperature control
defective.
No thermostat in engine water outlet
manifold.
Plugged drainage hose.
Dirty filters.
Low refrigerant level.
Switch contacts in thermostat
burned excessively, or sensing
element defective.
Clutch coil burned out or
disconnected.
Condenser fins plugged.
Blower motor disconnected or
burned out.
Loose or broken drive belt.
Compressor partially or completely
seized.
Dirty filters.
Broken or disconnected electrical
wire.
Broken or disconnected ground
wire.
Expansion valve stuck in open or
closed position.
Broken refrigerant line.
Leak in system.
207
SOLUTION
Contact MacDon dealer.
Clean filter.
Clean filter
Clean evaporator.
Remove blockage.
Open valve.
Replace thermostat.
Replace control.
Install thermostat.
Blow out hose with compressed
air.
Clean filters.
Add refrigerant
Replace thermostat.
Contact MacDon dealer.
Clean condenser.
Contact MacDon dealer.
Replace drive belt and/ or tighten
to specs.
Remove compressor for service
or replacement.
Clean fresh air and re-circulation
filters.
Check all terminals for loose
connections; check wiring for
hidden breaks.
Check ground wire to see if
loose, broken, or disconnected.
Contact MacDon dealer.
(continued next page)
Issue – June 2008
SECTION
*
7.8.6.1
7.8.6.2
7.8.6.4
---
5.10.1.1
**
**
**
---
7.8.6.1 &
7.8.6.2
*
**
*
7.9.7.5
*
7.9.10.2
**
7.8.6.1 &
7.8.6.2
---
---
*