Mitsubishi 3000GT 1994 Workshop Manual page 1012

55-48
HEATER, AtR CONDTTIONER
AND VENTILATION
-
Compressor
SERVICE POINT OF DISASSEMBLY
3.
REMOVAL
OF NUT
INSPECTION
snoru
HIGH PRESSURE RETIEF
VATVE
CHECK
The high pressure relief valve
is
a
safety feature which releases
part
of the
refrigerant inside the system into the atmosphere
when the high pressure level exceeds 3,550
kPa
(35
kg/cmz, 505
psi):
R-1
2:3-,740
kPa
(37 kg/cm2, 532 psi):
R-134a
during air con-
ditioner operation.
Once
the pressure
inside the system has been reducqd
to2,40O
kPa(24 kg/cm2,341 psi): R-12:2,940
kPa (29
kglcm2,418 psi):
R-134a or
lowe[ the high pressure relief valve closes, thusallow-
ing continued operation.
(1)
lf a leak is detected at section A, replace the high pressure
relief valve. The valve can be used unless there is
a
leak
from that
section.
(21
lf a leak is detected at section B, retighten the valve. lf the
leak
still persists after
retightening
the valve, replace the
packing.
THERMOSTAT CHECK
(1) Dip
the
thermostat
in
engine
oil.
(2)
Check
for continuity across terminals
@
and
@ when the
engine
oil is
heated.
Standard value:
Gontinuity
at
approx.
110"C (230"F)
or
less
atA point
No continuity
at
approx.
155"C (311"F)
ol
more
at
B
poirt
<Vchiclec
using
R-12
refrigerant>
<Vdhicles using
R-134a
refrigeant>
A
Spring
Valve
Compressol
20FO1G7
@
ilttrubishi
Motoß
Corpor.tion
July 1993 PWUEgl19-B
FEI'IICD