LG LSC27918ST, Service Manual

Page: 58 / 84

2-7. Sound
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.
- 58 -