Excess Error; Thermal Error; Motor Error; Heater Error - LG LDF8874ST Service Manual

ERROR MESSAGE

EXCESS ERROR

displayed
Condition
Excessive water is sup-
plied than normal water
level.(Automatically drain
Pump operated.)

THERMAL ERROR

displayed
Condition
The resistance of ther-
mistor not normally out put.

MOTOR ERROR

displayed
Condition
The Motor is working
abnormally .

HEATER ERROR

displayed
Condition
The water is not heated or
the temperature in the Tub
is overheated to over 194ßF
VARIO ERROR
displayed
Condition
The position of vario cam is
not properly.
POSSIBLE CAUSE
FOR ERROR OCCURRENCE
The Inlet Valve is troubled.
The Controller is troubled.
The float assembly is not working
The Inlet Water Temperature is
very high. (over 194 )
Wiring connection is OK?
The Thermistor is OK?
Wiring connection is OK?
The Impeller of Washing Pump is
locked.
The rotor of Washing Motor is
locked.
The Blade is locked.
The Circuit of Heater is troubled.
The Thermistor is troubled.
The Heater is shorted.
The Relay Circuit is troubled.
Wiring connection is OK?
Does the vario S/W assembled
properly?
Is the vario motor operated
properly?
(range is 12~15 )
- 26 -
For Authorized Service Technician
REMEDY
Replace the Inlet Valve.
Repair or replace the Controller
Change the float assembly.
Check the temperature. (Test Mode)
If the temperature is displayed,
adjust the Inlet Water
Temperature to 120 .
If the temperature is not
displayed,
check the wiring connection.
check the electric resistance
of Thermistor.
(11~14k at 77 )
Replace the PCB.
Check the wiring connection.
Replace the cause of restriction.
Replace the Washing Motor.
Replace the PCB.
Repair the Circuit of Heater.
Replace the Thermistor.
Replace the Heater.
Repair the Relay Circuit..
Check the wiring connection.
Reassemble vario S/W.
Replace the vario motor.
.
.