Operational Check

The purpose of the operational check is to confirm that the system operates properly.

After operational check is completed, go to "SYMPTOM TABLE".

CONDITIONS:
- Engine running and at normal operating temperature.

PROCEDURE:




1. Check blower
a. Turn fan switch to 1-speed.
Blower should operate on 1-speed.
b. Then turn fan switch to 2-speed, and continue checking blower speed until all speeds are checked.
c. Leave blower on 4-speed.

2. Check discharge air




a. Press each mode switch.




b. Confirm that discharge air comes out according to the air distribution table, and that the indicator lamp illuminates.
Refer to "Discharge Air Flow".

NOTE: Confirm that the compressor clutch is engaged (visual inspection) and intake door position is at FRESH when the DEF mode is selected.
Confirm that the intake door position is at FRESH when the
F/D mode is selected.
Intake door position is checked in the next step.




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

NOTE:
- Recirculation does not operate in DEF and F/D modes.
- Recirculation automatically occurs when the following conditions are met:
1. FACE mode.
2. Full cold position.
3. Fan switch to 4 speed.
4. A/C switch on.
Recirculation indicator will not illuminate.




4. Check temperature decrease
a. Slide temperature control lever to full cold.
b. Check for cold air at discharge air outlets.




5. Check temperature increase
a. Slide temperature control lever to full hot.
b. Check for hot air at discharge air outlets.




6. Check air conditioner switch
Turn the fan control switch to the desired (1 to 4 speed) position and push the A/C switch to turn ON the air conditioner.

The indicator lamp should come on when air conditioner is ON.