3-4. Practical Work For Heavy Repair
TROUBLE DIAGNOSIS
- 99 -
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/cm
2
) 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 blocked 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
Summary of Contents for LRSPC2051AB
Page 41: ...2 GR C247 B247 C207 B207 EXPLANATION FOR MICOM CIRCUIT 41 b e c f a d Speed Speed ...
Page 48: ...2 GR C247 B247 C207 B207 EXPLANATION FOR MICOM CIRCUIT 48 ...
Page 49: ...3 2 Parts list 1 GR P247 L247 P207 L207 EXPLANATION FOR MICOM CIRCUIT 49 ...
Page 50: ...EXPLANATION FOR MICOM CIRCUIT 50 WATER SUPPLY S W ...
Page 51: ...2 GR C247 B247 C207 B207 EXPLANATION FOR MICOM CIRCUIT 51 ...
Page 52: ...EXPLANATION FOR MICOM CIRCUIT 52 WATER SUPPLY S W ...
Page 53: ...3 3 DISPLAY ASSEMBLY part diagram 1 GR P247 L247 P207 L207 EXPLANATION FOR MICOM CIRCUIT 53 ...
Page 54: ...2 GR C247 B247 C207 B207 EXPLANATION FOR MICOM CIRCUIT 54 DOUBLE SIDE TAPE SPREAD SHEET ...
Page 58: ...EXPLANATION FOR MICOM CIRCUIT 58 PCB ASSEMBLY DISPLAY ...
Page 59: ...2 GR C247 B247 C207 B207 EXPLANATION FOR MICOM CIRCUIT 59 PWBASSEMBLY MAIN ...
Page 60: ...EXPLANATION FOR MICOM CIRCUIT 60 PCB ASSEMBLY DISPLAY ...
Page 67: ...CIRCUIT 67 ...
Page 68: ...CIRCUIT 68 ...