LG GR-B206GVQA User Manual download pdf (Page 102)

3-4.

Practical

Work

For

Heavy

Repair

TROUBLE

DIAGNOSIS

-102-

Items

Precautions

1.

Removal

of

residual

refrigerant.

1)

Remove

residual

refrigerant

more

than

5

minutes

later

after

turning

off

the

refrigerator.

(

If

not,

compressor

oil

may

leak

inside.)

2)

Remove

retained

refrigerant

slowly

by

cutting

first

high

pressure

side

(drier

part)

with

a

nipper

and

then

cut

low

pressure

side.

2.

Nitrogen

blowing

welding.

When

replacing

a

drier:

Weld

and

parts

by

blowing

nitrogen(0.1~0.2kg/cm2)

to

high

pressure

side

after

assembling

a

drier.

When

replacing

a

compressor:

Weld

and

parts

by

blowing

nitrogen

to

the

low

pressure

side.

Note)

For

other

parts,

nitrogen

blowing

is

not

necessary

because

it

does

not

produce

oxidized

scales

inside

pipe

because

of

its

short

welding

time.

3.

Replacement

of

drier.

Inserting

a

capillary

tube

Measure

distance

with

a

ruler

and

put

a

mark(12+3/-0)on

the

capillary

tube.

Insert

tube

to

the

mark,

and

weld

it

KEYPOINTING

Observe

the

sequence

for

removal

of

refrigerant.

(If

not,

compressor

oil

may

leak.)

KEYPOINTING

Welding

without

nitrogen

blowing

produces

oxidized

scales

inside

a

pipe,

which

affect

on

performance

and

reliability

of

a

product.

KEYPOINTING

Be

sure

to

check

the

inserted

length

of

capillary

tube

when

it

is

inserted.

(If

too

much

inserted,

a

capillary

tube

is

clogged

by

a

filter.)

Compressor

Low

pressure

side

Condenser

High

pressure

side

Drier

Evaporator

Release

Refrigent

Intake

Suction

1

2

1

2

Evaporator

Drier

High

pressure

side

Condenser

Refrigent

Intake

12+3

-0

Filter

*Unit:mm

1 2 ... 97 98 99 100 101 102 103 104 105 106 107 ... 124 125

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