N:09:04
Heating and Air Conditioning
Continue
OFF ALL TIMES
Check compressor hot lead
wire with test light or place
jumper wire from
compressor to positive ( +)
terminal of battery.
T
NOT ENGAGED
Apply external ground
to compressor. If
clutch is still not
engaged,
remove
clutch and repair.
ENGAGED
I
Check for blown
main fuse.
T
FUSE BLOWN
FUSE
O.K.
I
Check the following for
open circuits:
Low pressure switch
High pressure switch
T
O.K.
_L
OPEN
Replace defective
part.
F'
|
Check low charge
pressure switch for
open circuit.
T
OPEN
CLOSED,
OR
O.K.
Look for broken wire or
loose connection in clutch
circuit. Repair as necessary
— Wiring Diagram.
I
Check
refrigerant
pressure at high side
service fitting.
T
BELOW
50PSIG
AT60°F
Low charge. Leak
test and repair.
Evacuate and
re-charge.
ABOVE 50
PSIG
1
)
s
"'\
f-
r
:i
Jump pressure switch, and
compressor runs. Defective
switch.
Leak check system
and replace switch.
Evacuate and
re-charge.
Fig. 62
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