DAF LF45, LF55 Series. Manual - part 394

16

1427090/03

EL001577

1

2

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1000

2100

2100

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

9001

2170

2170

2170

2170

2170

2170

1000

E349

1

2

2

4

1

C622

A13/702

A11/702

A10/703

4

732

B10/703

3

736

7

739

A10

713

6

762

7

738

1/710

A000

21

2

765

C022

1

2

10

739

12

762

C158

1

2

C159

1

2

10

738

G520

1

765

5/711

D942

1010

1000

1010

1000

2101

2170

2170

2100

E284

10A

G000

3

1

24

5

M

A2/

752

B525

A5/

752

C865

A

B

C866

A

B

C864

A

B

C736

A

B

C715

A

B

C727

A

B

C804

A

B

C748

A

B

C763

A

B

!

!

G507

G507

200440



2-65

5

ELECTRICAL SYSTEM

Electrical system

series

45/55

LF

200440



2-66

5

ELECTRICAL SYSTEM

Electrical system

series

45/55

LF

16

1427090/03

EL001578

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106

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

2170

2029

2170

2170

D942

1010

1000

1010

1000

8/709

B1/700

6/708

2170

2170

C750

A

B

C880

A

B

C853

A

B

C870

A

B

C836

A

B

C725

A

B

C867

A

B

C774

A

B

C835

A

B

01

C765

A

B

25

1

7

6

3

800

1

800

200440



2-67

5

ELECTRICAL SYSTEM

Electrical system

series

45/55

LF

17.

AIR

C

ONDITIONING/HEA

TER

FAN

HEA

T

ER

FA

N

The

heater

motor

(B377)

is

supplied

w

ith

voltage

after

contact

through

fuse

E031.

The

motor

is

activated

when

the

heater

fan

switch

(C892)

is

turned,

so

that

earth

is

connected.

The

heater

fan

m

otor

is

fitted

w

ith

an

overheating

protection

device

between

contact

7

and

the

connection

points

of

the

operating

switch.

AIR

C

ONDITIONING

Depending

on

the

engine

temperature,

voltage

is

applied

to

w

ire

5189

from

pin

A1/743

of

the

V

IC

unit.

When

the

engine

temperature

goes

above

a

certain

value,

the

VIC

unit

switches

this

voltage

of

fs

o

as

to

prevent

the

engine

from

overheating.

When

the

temperature

falls

back

below

a

particular

temperature,

the

voltage

is

switched

on

again.

To

supply

the

air

conditioning

switch

(C893)

with

voltage,

the

parallel

switch

in

the

heater

fan

switch

(C892)

must

be

closed.

This

switch

is

closed

in

positions

1

to

4.

T

he

air-conditioning

compressor

temperature

switch

(E508)

prevents

the

heater

fan

from

freezing

and

is

closed

at

normal

operating

temperature.

The

air

conditioning

operating

switch,

high/low

pressure,

is

operated

depending

on

the

pressure

in

the

air

conditioning

system.

When

all

conditions

have

been

met,

the

air

conditioning

compressor

(B043)

is

activated.

Diode

D787

is

fitted

in

the

air

conditioning

compressor

so

as

to

damp

high

voltage

peaks

that

can

arise

during

switch-of

f.

200440



2-68

5

ELECTRICAL SYSTEM

Electrical system

series

45/55

LF