I
Cooling unit (Evaporator)
With engine OFF, turn blower fan on “High” for at least 15
seconds to dissipate any refrigerant trace in the cooling unit.
Wait a minimum of 10 minutes accumulation time (refer to the
manufacturer’s recommended procedure for actual wait time)
before inserting the leak detector probe into the drain hose.
Keep the probe inserted for at least ten seconds. Use caution
not to contaminate the ptobe tip with water or dirt that may be
in the drain hose.
5.
If a leak detector detects a leak, verify at least once by blow-
ing compressed air into area of suspected leak, then repeat
check as outlined above.
6.
Do not stop when one leak is found. Continue to check for
additional leaks at all system components.
If no leaks are found, perform steps 7 - 10.
7.
Start engine.
8.
Set the heater A/C control as follows:
1)
A/C switch ON.
2)
Face mode
3)
Recirculation switch ON
4)
Max cold temperature
5)
Fan speed high
9.
Run engine at 1,500 rpm for at least 2 minutes.
10. Turn engine off and perform leak check again following steps
4 through 6 above.
SHA839E
Refrigerant leaks should be checked immediately after
stopping the engine. Begin with the leak detector at the
compressor. The pressure on the high pressure side will
gradually drop after refrigerant circulation stops and pres-
sure on the low pressure side will gradually rise, as shown
in the graph. Some leaks are more easily detected when
pressure is high.
11. Before connecting Recovery/Recycling Recharging equipment
to vehicle, check Recovery/Recycling Recharging equipment
gauges. No refrigerant pressure should be displayed. If pres-
sure is displayed, recover refrigerant from equipment lines and
then check refrigerant purity.
12. Confirm refrigerant purity in supply tank using Recovery/
Recycling Recharging equipment and refrigerant identifier.
13. Confirm refrigerant purity in vehicle A/C system using
Recovery/Recycling Recharging equipment and refrigerant
identifier.
14. Discharge A/C system using approved refrigerant recovery
GI
MA
EM
LC
EC
FE
AT
AX
SU
BR
ST
RS
BT
SC
EL
IDX
SERVICE PROCEDURE
Refrigerant Lines (Cont’d)
HA-121