Isuzu Amigo / Axiom / Trooper / Rodeo / VehiCross. Service manual - part 25

HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–71

Automatic Air Conditioner Block Diagram

F01R200004

1A–72 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Control Panel Layout

865R200006

Legend

(1) Temperature Control Switch
(2) Auto Switch
(3) DEF Mode Switch
(4) Rr DEF Mode Switch

(5) Intake Switch
(6) Mode Switch
(7) Air Conditioning Switch
(8) Fan Switch
(9) Off Switch

HEATING, VENTILATION AND AIR CONDITIONING (HVAC) 1A–73

Air Control Functions

C01R200013

Legend

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

(7) Evaporator Unit
(8) Heater Core
(9) Heater Unit

(10) Sub Air Mix Door

(11) FOOT Door

(12) VENT Door

1A–74 HEATING, VENTILATION AND AIR CONDITIONING (HVAC)

Control Panel Switch Operation

Switch Name

Panel Display

Switch Operation

A

u

t

o

 

S

w

i

t

c

h

During manual outside air intake (FRESH), pressing the AUTO
switch cancels manual outside air intake. The display panel shows
the current set temperature, the current air outlet(s), and the blower
speed. The intake switch LED shows the current air source. The
A/C switch LED is on.

Air volume, air outlet operation, and air source are controlled
automatically. The compressor is on.
During manual inside air recirculation (REC), pressing the AUTO
switch does not cancel inside air recirculation. The intake switch
LED is on.

O

f
f
 

S

w

i

t

c

h

When the OFF switch is pressed, the display panel clears except
for the air outlet indication. Blower and compressor operation stop.
The air source switches from automatic to outside air.

 During manual inside air recirculation (REC), pressing the OFF
switch does not cancel inside air recirculation. The intake switch
LED is on.

F

a
n

Y

·

B

S

w

i

t

c

h

When the fan switch is pressed, air outlet volume (fan speed) can
be manually controlled. Other control switches are unaffected. The
display panel clears AUTO indication.
1. FAN switch is pressed during automatic fan control (AUTO)

Fan control (AUTO)

→

Press 

Y

 fan switch

→

Fan speed increases

from automatic set speed to HI
Fan control (AUTO)

→

Press 

B

 fan switch

→

Fan speed decreases

from automatic set speed to LO

2. Fan switch is pressed when the fan is off.

Fan (OFF)

→

Press 

Y

 fan switch

→

The fan operates at LO speed

Fan (OFF)

→

Press 

B

 fan switch

→

The fan operates at LO speed

3. Fan switch is pressed when the fan is in manual operation.

Manual (LO)

→

Press 

Y

 fan switch

→

Manual operation 

(LO)

→

 (M1)

→

(M2)

→

(M3)

→

(HI)

Manual (HI)

→

Press 

B

 fan switch

→

Manual operation

(HI)

→

(M3)

→

(M2)

→

(M1)

→

(LO)

M

o
d
e

 

S

w

i

t

c

h

Press the mode switch to manually select the air outlet(s). Each
time the switch is pressed, the air outlets change in the progression
shown below.

Mode switch (Automatic control of air
outlets)

→

VENT

→

BI-LEVEL

→

FOOT

→

DEF/FOOT