Isuzu Trooper (2000 year). Manual - part 30

HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–89

Automatic Air Conditioner Block Diagram

F01RY00006

1A–90 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Control Panel Layout

865RY00024

Legend

(1) Auto Switch
(2) Mode Switch
(3) DEF/FOOT Switch
(4) DEF Switch

(5) Intake Switch
(6) Fan Switch
(7) Air Conditioning Switch
(8) Temperature Control Knob

HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–91

Air Control Functions

C01RY00004

Legend

(1) Interior Air Intake
(2) Fresh Air Intake
(3) Evaporator Core
(4) Air Mix Door
(5) DEF Door
(6) VENT Door

(7) FOOT Door
(8) Sub Air Mix Door
(9) Heater Unit

(10) Heater Core

(11) Evaporator Unit

(12) Blower Unit

1A–92 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Operation and Functions of Control Panel Switches

Auto Switch

1. Pressing this switch turns on the automatic control

mode.  It resets all manual switches except that for
the fan control.  However, when the Manual REC is
selected for the intake or the Manual Open is
selected, the modes are maintained.

2. It causes the A/C (air conditioner) to the ON mode

(this function, however, available only when the fan is
turned on and also the compressor is turned on
because of the given outside air temperature level).

Indication

D

The AUTO LED is turned off.

D

Currently selected mode for the Mode and Intake are
respectively indicated.

D

The A/C LED remains turned on even if the
compressor has been turned off because of the given
outside air temperature level.  Pressing the air
conditioning switch in this state turns off the A/C LED.

Mode Switch

1. Pressing the VENT, B/L or FOOT switch selects the

corresponding mode.

2. When the Auto is selected for the Mode and Intake,

pressing the mode switch fixes the Intake to the
immediately preceding status.

Indication

D

The AUTO LED is turned off.

D

Currently selected blow port is indicated.

DEF Switch

Press this switch to select the DEF mode.

Blow port

Intake port

A/C

MIX

DEF

Auto FRESH *1

ON mode *2

Auto

*1: When the manual REC is selected for the Intake, the
manual REC is maintained.
*2: The ON mode is enabled only when the fun is turned
on, and also the compressor is turned on because of the
given outside air temperature level.

Indication

D

The AUTO LED is turned off.

D

The DEF LED and the A/C LED are turned on.

D

The indication of the intake LED depends on the
system condition.

F01RX006

Intake Switch

Pressing this switch sequentially selects a different intake
port in the following order.