Precautions for Refrigerant Connection
A new type refrigerant connection has been introduced to all refrigerant lines except the following location.
lExpansion valve to cooling unit
FEATURES OF NEW TYPE REFRIGERANT CONNECTION
lThe O-ring has been relocated. It has also been provided with a groove for proper installation. This elimi-
nates the chance of the O-ring being caught in, or damaged by, the mating part. The sealing direction of the
O-ring is now set vertically in relation to the contacting surface of the mating part to improve sealing char-
acteristics.
lThe reaction force of the O-ring will not occur in the direction that causes the joint to pull out, thereby
facilitating piping connections.
CAUTION:
The new and former refrigerant connections use different O-ring configurations. Do not confuse
O-rings since they are not interchangeable. If a wrong O-ring is installed, refrigerant will leak at, or
around, the connection.
O-ring part numbers and specifications
Connection
typeO-ring
sizePart number D mm (in) W mm (in)
New
892471 N8210 6.8 (0.268) 1.87 (0.0736)
Former 92470 N8200 6.07 (0.2390) 1.78 (0.0701)
New
1292472 N8210 10.9 (0.429) 2.43 (0.0957)
Former 92475 71L00 11.0 (0.433) 2.4 (0.094)
New
1692473 N8210 13.6 (0.535) 2.43 (0.0957)
Former 92475 72L00 14.3 (0.563) 2.3 (0.091)
New
1992474 N8210 16.5 (0.650) 2.43 (0.0957)
Former 92477 N8200 17.12 (0.6740) 1.78 (0.0701)
SHA815E
SHA814E
PRECAUTIONS AND PREPARATIONMANUAL
HA-4003
DIAGNOSTIC PROCEDURE
SYMPTOM: Magnet clutch does not engage when A/C
switch and fan switch are ON.
CHECK POWER SUPPLY FOR COM-
PRESSOR.
Disconnect compressor harness connector.
Do approx. 12 volts exist between com-
pressor harness terminal No.
V1and body
ground?
No
cYes
Check magnet clutch coil.
NG
Replace magnet clutch.
Refer to HA-64.
Disconnect A/C relay.
Note
CHECK CIRCUIT CONTINUITY
BETWEEN A/C RELAY HARNESS TER-
MINAL NO.
V5AND COMPRESSOR
HARNESS TERMINAL NO.
V1.
Continuity should exist.
If OK, check harness for short.
OK
CHECK POWER SUPPLY FOR A/C
RELAY.
Disconnect A/C relay.
Do approx. 12 volts exist between A/C
relay harness terminal Nos.
V2,V3and
body ground?
Yes
cNo
CHECK POWER SUPPLY
CIRCUIT AND 10A (No.
13)
FUSE AT FUSE BLOCK.
Refer to EL section (ªWir-
ing Diagramº, ªPOWER
SUPPLY ROUTINGº).
CHECK A/C RELAY AFTER DISCON-
NECTING IT.
Refer to HA-4025.
OK
cNG
Replace A/C relay.
VA
(Go to next page.)
Note:
If the result is NG or No after checking circuit continuity, repair harness or
connector.
SHA843F
RHA176I
SHA620F
RHA177I
.
.
.
.
.
.
TROUBLE DIAGNOSESAUTO
Magnet Clutch (Cont'd)
HA-4024
