1979 DATSUN 210 fuse

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Page 500 of 548

DATSUN 210 1979 Service Manual
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Page 501 of 548

DATSUN 210 1979 Service Manual
Condition

Insufficient

heating

performance

No
heated

air

discharged

Insufficient
air

flow

to

floor

Insufficient

defrosting

performance

Cold
air

discharged

Insufficient
air
flow

Page 502 of 548

DATSUN 210 1979 Service Manual
DATSUN

210
Model

8310
Series

SECTIONAC

AIR
CONDITIONING

CONTENTS

DESCRIPTION

OUTLINE
OF
AIR
CONDITIONER

REFRIGERATION
SYSTEM

AIR
FLOW

VACUUM
SYSTEM

ELECTRICAL
CIRCUIT

GENERAL
S

Page 508 of 548

DATSUN 210 1979 Service Manual
Air

Conditioning

4

1
Control
wire

2
Control
rod

3
Intake
actuator

4
Vacuum

switch

5

Check
valve

6
Intake

return

spring

7
Intake
door

AC268A

Fig
AC
9
Intake
Actuator

AC

Page 509 of 548

DATSUN 210 1979 Service Manual
Air

Conditioning

Ale
position

Main

relay

Blower

motor

Fan
switch

Fusible

r
link

o
c

Fuse

This

fuse
is
built

into
air

con
harnes
s
I

L
RW
B
5
d

2nd

I
I
olst

Resistor

Page 518 of 548

DATSUN 210 1979 Service Manual
COMPRESSOR

OIL
LEVEL
CHECK

The
oil
used
to
lubricate

compres

sor
circulates
into

system
from
the
oil

sump
while

compressor
is

operating

Therefore
to

correctly
measure
com

p

COMPRESSOR

OIL
LEVEL
CHECK

The
oil
used
to
lubricate

compres

sor
circulates
into

system
from
the
oil

sump
while

compressor
is

operating

Therefore
to

correctly
measure
com

pressor
oil
the
amount
of
oil

flowing

to

system
must
be
considered
If
a

considerable
amount
of

leakage
of

refrigerant
gas
happens
the

leakage
of

compressor
oil
is
also

considered

There
will
be
no

compressor
oil
leak

age
from
a

completely
sealed

system

When

system
operates
under

satisfying

condition
the

compressor
oil
level

check
is

unnecessary

When

checking
the
level
of
com

pressor
oil

or
when

replacing
any

component
part
of
the

system
use
the

following
service

procedure
This

facio

litates
to

return
oil
to

compressor

1

Operate
compressor
at

engine

idling
speed
I
OOO

rpm
or
below

with

controls
set
for

maximum

cooling

and

high
blower

speed
for
10
to
15

minutes
in
order

to
return
com

pressor

oil
to

compressor

2

Stop
the

engine
and

discharge

refrigerant
of

system
and
then

remove

compressor
from
the

car

3

Remove

compressor
filler

plug

Drain

compressor
oil
from

compres

sor
oil

sump
and
measure
the
amount

AC742

Fig
AC
23
Filler
Plug

4

Compressor
oil
is

satisfactory
if

the

following
amount
of
oil
remains
in

the

compressor

Residual
oil

140
to
220
cc

4
7

to
7
4
US
fl
oz

4
9
to
7
7

Imp
fl
oz
Air

Conditioning

5
Check
the

cleanliness
of
the

oil
If

the
oil
contains

chips
or
other

foreign

material
clean

oil

sump
with
new
oil

6
Discard
the
used
oil
and
fill
with

the
same

amount
of

new
oil
Add

oil
if

found
less

than
above
amount

If

compressor
is

inoperative
due

to

faulty
compressor
or

heavy
loss
of

refrigerant
remove

compressor
and

repair
as

necessary
Then

pour
oil

up

to

correct
level
and
install
on

engine

After
above

steps
have
been

com

pleted
recheck

oil
level
drain
oil

to

correct
level

if
level
is

excessively
high

CAUTION

a
The
oil
should
not
be
transfused

from
a
container
into
another
as

the
failure
will

possibly
cause

moisture
to
mix
with
the
oil

b
The
used
oil
should
not
be
returned

into

a
container

c
The
oil
should
not
be
used
if
its

state
of

preservation
is
not
clear

enough

PERFORMANCE
TEST

The

cooling

per
ormance
of
the

air

conditioner

changes
considerably
with

changes
in

surrounding
conditions

Testing
must
be

performed
using
the

correct
method
This
test
is
used
to

judge
whether

system
is

operating
cor

rectly
and

can
also
be
used

as
a

guiqe

in

checking
for

problems

1
Park
the

car
indoors
or
in
the

shade

2

Open
all
the
windows

of
the
car

fully
However
close
the
doors

3

Open
the
hood

4
Connect

manifold

gauge
to

high

and
low

side
service
valves
of
the

system
Refer
to

Handling
Manifold

Gauge

5

Set
air
lever
to

AIC

position

6
Set

temperature
lever
to
maxi

mum
cold

position

7

Set
blower
to
its

highest

speed

8
Start
the

engine
and
hold

engine

speed
at
1
500

rpm

9
After
the
air
conditioner
has
been

operated
for
about
10
minutes
meas

ure

system
pressures
at

high
pressure

discharge
side
and
low

pressure
suc

tion

side

10
Measure
the

temperature
of
dis

AC
17
charge
air
at
the

center
outlet

grille

11
Measure

the

temperature
and

humidity
of
the

evaporator
in
take
air

at

the

recirculating
air
inlet

of
the

evaporator

12
Measure
the

temperature
and

humidity
of
the
ambient
air
at
a

point

I
m
3
3
ft

front
of

condenser

However
a

dry
bulb

and
wet
bulb

must
not
be

placed
in

direct
sunlight

13

Check
for

any
abnormalities
by

comparing
the
test
results

with
stand

ard

pressure
Refer
to

Performance

Chart

Note

a

The

pressure
will

change
in
the

following
manner
with

changes
in

conditions

When

blower
speed
is
low
dis

charge
pressure
will

drop

When
the
relative

humidity
of
in

take
air
is
low

discharge
pressure

will

drop

b

The

temperature
will

change
in
the

following
manner

with

changes
in

conditions

When
the
ambient
air

temperature

is
low
the
outlet
air

temperature

will
become
low

If
the
test
reveals
that

there
is

any

abnormality
in

system
pressure
isolate

the

cause
and

repair
Refer
to
Trouble

Diagnoses
and
Corrections

REFRIGERANT

LEAKS

If
leaks
are

noticeable
leaky
parts

should
be

repaired
Then
system

should

be
fIlled
with

refrigerant

CAUTION

00

not

operate
compressor
with

refrigerant
level

excessively
low

If
this
caution
is

neglected
a
burnt

compressor
will
result
since

heavy
loss

of

refrigerant
usually
indicates

heavy

loss
of

compressor
liil

I

f

system
has
been

exposed
to

atmosphere
for

an
extended

period
of

time

I
receiver

drier
must
be

replaced

If
leaks
are

slight
and

no
air
is

present

in

system
add

refrigerant
as

necessary

To
detect
leaks

refer
to

Checking

Page 525 of 548

DATSUN 210 1979 Service Manual
LOW
PRESSURE

SWITCH

REMOVAL

AND

INSTALLATION

I
Disconnect

battery
ground
cable

2

Discharge

refrigerant
from

sys

tem

Refer
to

General
Service

3
Disconnect

connector
to
low

pr

Page 526 of 548

DATSUN 210 1979 Service Manual
WIRING
DIAGRAM

CIRCUIT
DIAGRAM

Air

conditioner
system

G
DD

w

FUSIBLE

LINK

I
BATTERY

LG
Lr

LG
c
J

LW
J

I
THERMOSTAT

W

W

r
B

B
8

ALTERNATOR

IGNITION

SWITCH

il

W

LB

LLG

J

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