LG GR-B197GVQ Service Manual page 81

T R O U B L E D I A G N O S I S
- 8 1 -
Problems Causes Checks Measures Remarks
No
defrosting Melting
fuse blows.
-
Check
melting
fuse with
tester.
-
Faullty parts: parts replacement.
1)
Lead wire is
cut.
If 0Ω: OK.
-
Check wire color when
maeasuring
2)
Bad
soldering.
If ∞Ω: wire is
cut.
resistance with
a
tester.
Ice in the Suction duct. 1. Check the inner duct with mirror.
1)
Turn power off.
1) Icing by foreign
materials in the
2)
Raise the front
side(door side),
duct.
support
the front side
legs,
and let
2) Icing by cool air inflow through the ice melt naturally. (If power is
the gap of heater plate.
on,
melt the frost by forced
3) Icing by
the gap of heater
plate. defrosting.)
2. Check
by inserting
soft copper
3)
Reassemble the heater
plate.
wire into the duct (soft and thin
copper
not to impair heating wire).
Bad cool air inflow and
discharge,
1. Turn
on power, open or
close the
1)
Check the
faulty connector
of
and bad defrosting due to faulty door, check that motor fan housing and reassemble wrongly
contact and insertion (bad connector
operates
(If it
operates,
motor fan assembled
parts.
insertion into housing of heater, is OK). 2)
If the
parts are
damaged,
melting,
fuse and
motor fan).
2. Disconnect
parts
in the
refrigerator
remove
the
parts
and
replace
it
compartment,
check the connection with
a new one.
around the
housing visually,
defrost, and confirm heat generation
on
the heater. Do not
put
hands
on
the sheath heater.
3. Check the
parts
which have faults
described in 1, 2
(mechanical
model: disconnect thermostat
from the assembly).