MacDon 9250 Operator's Manual page 121

SYMPTOM
Air conditioning not
producing sufficient
cooling (continued).
Air conditioning system
too noisy.
* See your Windrower dealer.
Form # 46584
TROUBLE SHOOTING
PROBLEM
Clogged expansion
valve.
Clogged receiver-drier.
Excessive moisture in
system.
Air in system.
Thermostat defective or
improperly adjusted.
Blower motor sluggish
in operation.
Defective winding or
improper connection in
compressor clutch coil
or relay.
Loose or excessively
worn drive belt.
Noisy clutch.
Noisy compressor.
Compressor oil level
low.
Blower fan noisy due to
excessive wear.
Excessive charge in
system.
Low charge in system.
119
SOLUTION
Recover system
refrigerant and replace
valve. Then, evacuate
and charge system.
Recover system
refrigerant and replace
receiver-drier. Then
evacuate and charge
system.
Recover system
refrigerant and replace
receiver-drier. Then
evacuate and charge
system.
Recover refrigerant,
evacuate and charge
system.
Replace thermostat.
Remove motor for
service/replacement.
Repair or replace as
necessary.
Tighten or replace as
required.
Remove clutch for serv-
ice or replacement as
required.
Check mountings and
repair. Remove
compressor for service
or replacement.
Add SP-20 PAG refrig-
erant oil.
Remove blower motor
for service or replace-
ment as necessary.
Discharge excess
refrigerant until pressure
drops within specs.
(Always recover
discharged refrigerant.)
Check system for leaks,
charge system.
Issue 11/06 Web Rev_01
REF.
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