MacDon M150 SP - Manual (Page 221)

TROUBLESHOOTING
* See your MacDon dealer
** Refer to Windrower Technical Manual
Form 169017 / 169087 / 169095
219
Revision C
SYMPTOM PROBLEM SOLUTION
SECTION
M150 M200
Air Conditioning Not
Cooling. (Continued)
Expansion valve stuck in open or
closed position.
Broken refrigerant line.
Leak in system.
Compressor shaft seal leaking.
Clogged screen in receiver-drier;
plugged hose or coil.
Contact MacDon Dealer. *
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.
Remove clutch assembly for
service or replacement.
**
Clogged air filters.
Remove air filters and clean, or
replace as necessary.
7.7.6.1 & 7.7.6.2
Heater circuit is open.
Close heater valves (1 in cab, 1 at
engine).
5.10.1
Too little air circulation over condenser
coil; fins clogged with dirt or insects.
Clean condenser. 7.10.2
Evaporator fins clogged.
Clean evaporator fins (under cab
floor).
7.7.6.4
Too little refrigerant in system.
Clogged expansion valve.
Clogged receiver-drier.
Excessive moisture in system.
Air in system.
Blower motor sluggish in operation.
Contact MacDon Dealer. *
Thermostat defective or improperly
adjusted.
Replace thermostat. **
Air Conditioning System
Too Noisy.
Defective winding or improper
connection in compressor clutch coil
or relay.
Contact MacDon Dealer. *
Loose or excessively worn drive belt. Tighten or replace as required. 7.8.10.2 7.9.10.2
Noisy clutch.
Remove clutch for service or
replacement as required.
**
Noisy compressor.
Check mountings and repair.
Remove compressor for service
or replacement.
Compressor oil level low. Add SP-15 PAG refrigerant oil.
Blower fan noisy due to excessive
wear. Remove blower motor for service
or replacement as necessary.
Excessive charge in system.
Low charge in system.
Excessive moisture in system.
Contact MacDon Dealer. *
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