MacDon M100 SP Operators Manual - Manual (Page 180)

TROUBLESHOOTING
* See your MacDon dealer
** Refer to Windrower Technical Manual
169304
178
Rev. C
SYMPTOM PROBLEM SOLUTION SECTION
Air Conditioning Not Cooling.
(Continued)
Compressor shaft seal leaking.
Contact MacDon dealer. *
Clogged screen in receiver-drier;
plugged hose or coil.
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. 7.7.5.1 &
7.7.5.2
Heater circuit is open. Close heater valves (1 in cab, 1
at engine).
5.10.1.1
Too little air circulation over
condenser coil; fins clogged with dirt
or insects. Clean condenser.
7.9.7.3
Evaporator fins clogged. Clean evaporator fins (under cab
floor).
7.7.5.4
Too little refrigerant in system.
Contact MacDon dealer. *
Clogged expansion valve.
Clogged receiver-drier.
Excessive moisture in system.
Air in system.
Thermostat defective or improperly
adjusted. Replace thermostat.
**
Blower motor sluggish in operation. Contact MacDon dealer. *
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.
7.8.8.4
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. Contact MacDon dealer. *
Low charge in system.
Contact MacDon dealer. *
Excessive moisture in system.
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