Operational Check

The purpose of the operational check is to confirm that the system is as it should be. The systems which will be checked are the blower, mode (discharge air), intake air, temperature decrease, temperature increase, A/C switch and the memory function.

CONDITIONS:
^ Engine running and at normal operating temperature.

PROCEDURE:




1. Check blower
1. Press fan switch (up side) one time. Blower should operate on low speed.
The fan symbol should have one blade lit
2. Press fan switch (up side) one more time.
3. Continue checking blower speed and fan symbol until all speeds are checked.
4. Leave blower on MAX speed





2. Check discharge air
1. Press mode switch four times and DEF button.




2. Confirm that discharge air comes out according to the air distribution table at left.
Refer to "Discharge Air Flow", "DESCRIPTION".

NOTE: Confirm that the compressor clutch is engaged (visual inspection) and intake door position is at FRESH when the DEF button is pressed.
Intake door position is checked in the next step.




3. Check recirculation
1. Press REC switch.
Recirculation indicator should illuminate.
2. Listen for intake door position change (you should hear blower sound change slightly).




4. Check temperature decrease
1. Press the temperature decrease button until 18°C (65°F) is displayed.
2. Check for cold air at discharge air outlets.




5. Check temperature increase
1. Press the temperature increase button until 32°C (85°F) is displayed.
2. Check for hot air at discharge air outlets.




6. Check ECON mode
1. Press ECON switch.
2. Display should indicate ECON (no AUTO, no MANUAL).
Confirm that the compressor clutch is not engaged (visual inspection).
(Discharge air will depend on ambient, in-vehicle, and set temperatures.)
3. Check for intake air at Fresh position.




7. Check AUTO mode
1. Press AUTO switch.
2. Display should indicate AUTO (no ECON, no MANUAL).
Confirm that the compressor clutch engages (audio or visual inspection).
(Discharge air and suction air will depend on ambient, in-vehicle, and set temperatures.)




8. Check memory function
1. Press OFF switch.
2. Turn the ignition OFF.
3. Turn the ignition ON.
4. Press the AUTO switch.
5. Confirm that the set temperature remains at previous temperature.




9. Check ambient display
Press AMB switch.
Display should show the outside (ambient) temperature for approximately 5 seconds.