LG GR-B277, Service Manual

Page: 90 / 134

17. Sound
TROUBLE DIAGNOSIS
- 90 -
Problems
Causes
Checks
Measures
Remarks
Hiss
sound
1. Loud sound of compressor
1.1 Check the level of the
1) Maintain horizontal level.
operation.
refrigerator.
2) Replace bushing and seat if they
1.2 Check the bushing seat
are sagged and aged.
conditions (sagging and aging).
3) Touch the piping at various place
along its route. Install a damper at
2. Pipes resonate sound which is
2.1 Check the level of pipes
the point where your tuch reduces
connected to the compressor.
connected to the compressor
the noise.
and their interference.
4) Avoid pipe interference.
2.2 Check bushing inserting
5) Replace defective fan and fan
conditions in pipes.
motor.
2.3 Touch pipes with hands or screw
6) Adjust fan to be in the center of
-driver (check the change of
the fan guide.
sound).
7) Leave a clearance between
interfering parts and seal gaps in
3. Fan operation sound in the freezer
3.1 Check fan insertion depth and
the structures.
compartment.
blade damage.
8) Reassemble the parts which make
3.2 Check the interference with
sound.
structures.
9) Leave a clearance if evaporator
3.3 Check fan motor.
pipes and suction pipe touch
3.4 Check fan motor bushing
freezer shroud.
insertion and aging conditions.
4. Fan operation sound in the
4.1 Same as fan confirmation in the
compressor compartment.
refrigerator.
4.2 Check drip tray leg insertion. 4.3 Check the screw fastening
conditions at condenser and drip tray.