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Nissan Juke F15. Manual - part 846

SYSTEM

HAC-19

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

HAC

ECO Mode Control

INFOID:0000000012200016

DESCRIPTION

• A/C auto amp. receives operation status of each switch (A/C operation signal), D-MODE setting status (ECO

mode signal), and “CLIMATE ECO” setting status (A/C ECO setting signal) from multi display unit via CAN

communication.

• A/C auto amp. operates air conditioning system in ECO mode, when D-MODE on multi display unit is set to

ECO mode while air conditioning system is in automatic control.

NOTE:

• For setting procedure of D-MODE, refer to

AV-203, "INTEGRATED CONTROL SYSTEM : System

Description"

• Activation or deactivation of ECO mode can be changed using multi display unit setting function (“CLI-

MATE ECO”). For setting procedure, refer to

AV-203, "INTEGRATED CONTROL SYSTEM : System

Description"

CONTROL OUTLINE

During ECO mode operation, A/C auto amp. changes air flow and control characteristics of air inlet, within a

range that may not spoil the comfort level, lowers operation ratio of compressor, and reduces the electrical

load. This reduces engine load and improved fuel economy. Refer to the following items for details of each

control.

Air Flow Control

• A/C auto amp. increases voltage to power transistor gate compared to ordinary operation and reduces volt-

age to blower motor. This reduces air flow.

• Since air flow is reduced, the amount of air that passes evaporator is reduced. Increase of evaporator tem-

perature can be moderated. Evaporator temperature is easily shifted to temperature control range for low

temperature protection control. Operation ratio of evaporator is reduced.

• Since air flow is reduced, the electrical load is reduced. Alternator power output can be moderated.

Air Inlet Control

• In the following conditions, A/C auto amp. controls air inlet and increases recirculation air mixing ratio com-

pared to ordinary operation.

- Ambient temperature: 25

°C (77°F) or more

- Temperature setting: Any temperature other than full cold [18

°C (60°F)] or full hot [32°C (90°F)]

- Air outlet: In automatic control

- Air flow: In automatic control

- Air inlet: In automatic control or in fresh air intake mode by manual control

- A/C switch: ON

• By increasing recirculation air mixing ratio, cooled air in passenger room is circulated in larger amount than

during ordinary operation. Air temperature blowing to evaporator is maintained at a low level. Evaporator

temperature increase can be moderated. Evaporator temperature is easily shifted to temperature control

range for low temperature protection control. Operation ratio of evaporator is reduced.

Fail-safe

INFOID:0000000012963107

FAIL-SAFE FUNCTION

If a communication error exists between the A/C auto amp. and multi display unit for 2 seconds or longer, air

conditioning is controlled under the following conditions:

—

12.2%

33.1%

16.3%

38.4%

—

16.3%

—

83.8%

Discharge air flow

MODE/DEF setting

position

Air outlet/distribution

Ventilator

Foot

Defroster

Center

Side

Front

Rear

A/C display

: OFF

Set temperature

: Setting before communication error occurs

Air outlet

: Automatic control

HAC-20

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

SYSTEM

Air flow

: Automatic control

Air inlet

: Fresh air intake (FRE)

A/C switch

: ON

OPERATION

HAC-21

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

HAC

OPERATION

Switch Name and Function

INFOID:0000000012200018

OPERATION AND DISPLAY

A/C Display (Display in Multi Display Unit)

• Air conditioning system operation status is indicated on display in multi display unit. Indication of air condi-

tioning system varies according to display mode of multi display unit. For changing procedure of display

mode, refer to

AV-203, "INTEGRATED CONTROL SYSTEM : System Description"

- In CLIMATE mode: Operation status of air conditioning system (setting temperature, air flow, and “AUTO”

)

is indicated on display when air conditioning system is turned ON. Setting temperature is indicated on dis-

play when MODE switch is pressed while air conditioning system is OFF.

- In D-MODE: Operation status of air conditioning system (setting temperature, A/C switch, and “AUTO”

) is

indicated on lower portion of display when air conditioning system is turned ON. Setting temperature is indi-

cated on display when MODE switch is pressed while air conditioning system is OFF.

NOTE:

*1: AUTO is indicated when both air flow and air outlet are in automatic control.

*2: Air Flow is indicated when air flow or air outlet is in manual control.

A/C Controller (Multi Display Unit)

Operation procedure of air conditioning system varies depending on display mode of multi display unit. For

changing procedure of display mode, refer to

AV-203, "INTEGRATED CONTROL SYSTEM : System Descrip-

tion"

• In CLIMATE mode: All operations of air conditioning system are possible.

JMIIA1050GB

A/C switch

OFF switch

Temperature control dial

AUTO switch

MODE switch (D/F)

DEF switch

Intake switch

Display

MODE switch (FOOT)

10. Fan control dial

11. MODE switch (B/L)

12. MODE switch (VENT)

JMIIA1051ZZ

HAC-22

< SYSTEM DESCRIPTION >

[AUTOMATIC AIR CONDITIONING]

OPERATION

A/C switch

Compressor control (switch indicator) changes between ON

⇔ OFF each time when switch is

pressed while air conditioning system is in the ON position.
NOTE:
When either of following operation is performed while A/C switch indicator is OFF, compressor control
change to ON but A/C switch indicator is not turned ON.
• AUTO switch is turned ON.
• Air outlet is set to D/F by MODE switch operation.
• Air outlet is set to DEF by DEF switch operation.
• Air inlet is changed to recirculation (REC) by intake switch operation.

OFF switch

Air conditioning system turns OFF and changes to the following status when switch is pressed while
air conditioning system is in the ON position.
• Air outlet: Foot
• Air flow: OFF
• Air inlet: Fresh air intake
• A/C switch: OFF

Temperature control dial

Setting temperature can be set within a range of 18

°C (60°F) – 32°C (90°F) at a rate of 0.5°C (1°F)

per adjustment using this dial.
• Clockwise rotation: Set temperature increases
• Counterclockwise rotation: Set temperature decreases
NOTE:
When air conditioning system is OFF position, setting temperature can be selected only while air con-
ditioning system state (when MODE switch is pressed) is indicated on the display.

AUTO switch

“AUTO” is indicated on display and air conditioning system operates according to the following setting
when switch is pressed.
• Air outlet: Automatic control
• Air flow: Automatic control
• Air inlet: Automatic control
• A/C switch*: ON
NOTE:
• When air outlet or air flow is manually operated while “AUTO” is indicated on display “AUTO” indi-

cation turns OFF. However, automatic control continues for other functions than air outlet or air flow.

• *: A/C switch (compressor control) is turned ON when AUTO switch is turned ON while A/C switch

indicator is OFF, but A/C switch indicator is not turned ON.

MODE switch

When each MODE switch is pressed, air outlet is switched and VENT, B/L, FOOT, or D/F

*1,2

can be

selected manually. (Switch indicator indicates air outlet status during automatic control.)
*1: Air inlet is set to fresh air intake (FRE) and A/C switch turns ON, when D/F is selected while air
conditioning system is in the ON position.
*2: A/C switch (compressor control) is turned ON when D/F is selected while A/C switch indicator is
OFF, but A/C switch indicator is not turned ON.
NOTE:
• Air outlet can be changed when air conditioning system is in the OFF position.
• Air outlet automatic control is released (“AUTO” turns OFF) when each MODE switch is pressed

while “AUTO” is indicated on display.

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