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AIR CONDITIONER DOES NOT OPERATE - continued
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AIR CONDITIONER DOES NOT OPERATE - continued - TM-10-3930-673-20-10505
TM 10-3930-673-20-1
30. AIR CONDITIONER DOES NOT OPERATE (CONT).
3
KNOWN INFO
TEST OPTIONS
Green light extinguished.
Voltage Test.
Is 24 vdc present at heater/air
Defrost fans OK.
STE/ICE-R #89.
conditioner switch where light
Wire 80 OK.
REASON FOR QUESTION
green wire connects pin 1?
POSSIBLE PROBLEMS
If voltage is not present, heater/air
Heater/air conditioner switch faulty.
conditioner switch is faulty.
Light green wire faulty.
Thermostat faulty.
Low pressure cut-off switch faulty.
Dark green wire faulty.
High pressure cut-off switch faulty.
Wire 81 faulty.
A/C compressor clutch faulty.
Replace heater/air
NO
conditioner switch
(Para 17-9).
YES
KNOWN INFO
TEST OPTIONS
4
Green light extinguished.
Voltage test.
Is 24 vdc present at
Defrost fans OK.
STE/ICE-R #89.
Wire 80 OK.
thermostat where light green
REASON FOR QUESTION
Heater/air conditioner switch OK.
wire connects?
If voltage is not present, light green
POSSIBLE PROBLEMS
wire is faulty.
Light green wire faulty.
Thermostat faulty.
Low pressure cut-off switch faulty.
Dark green wire faulty.
High pressure cut-off switch faulty.
Wire 81 faulty.
A/C compressor clutch faulty.
Repair light green
NO
wire (Para 8-48).
YES
2-452

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