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24-32
AIR-CONDITIONING-Service
Adjustment
Procedures
i-- 9 >
@
r
2ouo319
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2OW627
I
Suction gauge
Discharge
w-w
/
I
Suction
ww
Discharge
w-w
2OUO306
Suction
w-w
Discharge
gauge
2OUO307
AIR CONDITIONER
SWITCH
To jest
the Air Conditioner
Switch
(1) Disconnect
the harness
connector
for the air conditioner
switch.
(2) Jump
the lead wires as shown.
(3) Turn the blower switch ON.
(4) Momentarily
turn the ignition
switch on (do not crank the en-
gine), listen for the clutch engaging.
(5) If the clutch
does
not engage,
fin thermostat,
water
temperature
switch,
wiring
or fuse
may be faulty.
(6) If clutch
engages,
replace
the air conditioner
switch.
MAGNETIC
CLUTCH
(1) Disconnect
the wiring to the magnetic
clutch.
(2) Connect battery (+) voltage directly to the wiring for the mag-
netic clutch.
(3) If the magnetic
clutch is normal,
there will be a "click".
If the
pulley and armature
do not make contact
("click"),
there is a
malfunction.
COMPRESSOR
(1) Install the manifold
gauge set, and run the air conditioner.
(2) If a pressure
of approx.490
kPa (71 psi) is indicated
on the
suction gauge side and a pressure of approx.883
kPa (128 psi)
is indicated
on the discharge
gauge side, the compressor
has
abnormal
compression.
Replace the compressor.
(3) If a pressure of 294 to 392 kPa (43 to 59 psi) is indicated
on the
suction
gauge side and a pressure
of approx.1961
kPa (284
psi) is indicated
on the discharge
gauge side, it is suspected
that air is present
in the air conditioning
system.
Discharge
the system,
evacuate
and recharge
with specified
amount
of refrigerant.
(4) During operation
of the air conditioner,
cold air may stop flow-
ing after the elapse of time and this state is maintained
before
cold air flows out again.
If cold air stops flowing
out with
negative
pressure
indicated
on the suction
gauge side and a
pressure
of 588 to 980 kPa (85 to 142 psi) indicated
on the
discharge
gauge side, it is suspected
that water is present
in
the air conditioning
system.
Discharge
the system.
Replace
receiver
drier. Evacuate
and
check for leaks, and recharge with specified
amount
of refrig-
erant.
/ STB Revision
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