Subaru 1600 Service Manual page 586

N
I
Noisy
I I
Insufficient cooling
I
I
Blower does not Compressor
I I I
rotate. does not run.
I I I
I
No bubbles in sight glass
I
Compressor OFF Compressor ON Bubbles in sight glass
Refer to "Blower
Refer to "Com-
J
I
I
Motor
pressor
I
1
Diagnoses". Diagnoses".
Blower makes
Compressor When engine
Check refrigeration line
With manifold gauge, check system pressures.
noise.
itself makes rpm is changed,
for gas leaks, and repair Measure temperature of discharge air.
Repair or re-
noise. there are reso- leaks if any. Charge Refer to "Performance Test".
place blower.
Repair or nant sounds. refrigerant to correct
replace com- Retighten com- level. In case of too
Temperature of
I
pressor. pressor bracket many leaks, stop com-
outside air 21 (70) 26.5 (80) 32 (90) 38 (l00)
°c
(OF)
bolts. pressor, discharge the
1,961 - 2,746 2,256 - 3,236 2,746 - 3,727 3,629 - 4,707
Bearings of com pres-
"---J
Piping is reso- system, evacua te and Suction pressure
(20 - 28,
(23 - 33, (28 - 38, (37 - 48,
sor clu tch or idler
nating. Add
recharge the system.
kPa (kg/cm', psi)
284 - 398) 327 - 469) 398 - 540) 526 - 683)
pulley make noise.
Belt is loose.
cramp. As necessary, replace
13,534-16,476 14,097-18,143 17,162-20,497 19,712-23,046
Adjust belt.
receiver drier.
Head pressure
(138 - 168, (152 - 185, (175 - 209, (201 - 235,
Repair. kPa (kg/cm', psi)
1,962 - 2,389)
2,161 - 2,631) 2,489 - 2,972 2,858 - 3,342)
Air in system may
cause bubbles in sight
Temperature
glass.
difference (Outside 10 - 13.5 10.5 - 14.5 13 - 17 15 - 19.5
air - discharge air)
(50 - 56)
(51 - 58)
(55 - 63) (59 - 67)
°c
(OF)
.
•
_.
..
•
n
0
::::I
c:::a.
_.
,.
_.
0
J:
::::I
m
_.
::::I
»
IIQ
-t
Z
C')
~
<
m
Z
-t
r-
»
-t
Z
C')
--
w
~
--
•
Engine speed
: 1,500 rpm
•
Fan switch : Highest position
•
Mode lever : CIRC A/C MAX
•
Temperature control dial: COLD position
»
z
c
»
:tJ
;;,
0
Z
System pressure and temperature of discharge air are
Temperature of discharge
C
abnormal. Refer to "Performance Test Diagnoses" air is abnormal, but system
for detail. pressure is normal.
-t
0
I I I I
l
Suction pressure is low.
I
I
Suction pres-
I
I
Head pressure is
I
Suction pressure
is Check grommets on car's dash panel
sure is high.
high.
Check air flow system.
high, while head is
Refer to "Air Flow System".
for air leaks; check other seals of
low.
car.
Z
Z
C')
en
-<
Pipe at receiver Fin and tube of Expansion valve is
Overcharge of refrigerant.
drier outlet has evaporator have
open excessively,
Discharge some of refrig-
I
low temper;J.ture.
some dents.
or expansion erant to correct level.
Receiver drier is
Replace or repair
O-ring is damaged.
Air is mixed in. Discharge
Valve or gasket of
restricted. Replace evaporator. Replace expansion
system, and replace drier.
compressor is dam-
receiver drier. valve.
aged.
Evacuate and recharge
Repair or replace
en
-t
m
s:
system.
compressor.
Expansion valve is
Condenser's fin is dented
close excessively,
or clogged with dust.
or gas leakage from
Clean exterior surface
thermo bulb.
with water.
Replace expansion
valve.