LG LSE4617ST Service Manual page 75

Code Description
Left IGBT Sensor
CF5
Open/Short
Right IGBT
CF6
Sensor Open/
Short
CF7 Left Comm. Error
CF8 Right Comm. Error Communication Error at Right Module
CFA Over Current
CFC Over Voltage
CFF Box fan Error
Additional Error
Possible
Symptoms
Causes
Electric control
has detected a
Surface
fault condition.
element
Turn the control
control-
knob to theOff
beeps and
position to clear
entire LED
the display And
barflashes.
stop the beep-
ing.
TROUBLESHOOTING
Explanation
Left IGBT Sensor is Open or Short
Right IGBT Sensor is Open or Short
Right IGBT Sensor is Open or Short
Communication Error at Right Module
Over Voltage occurs at the Cooktop
Box fan not working properly
Number
Explanation
of Flashes
Top Thermistor
1
Open/Short
Heatsink Therm-
2
istor Open/Short
Communication
3
error
Box fan not
4
working
8-3
Check point
1. Check the IGBT
Resistance(Open)
2. Check the IGBT
Sensor(Short)
1. Check the IGBT
Resistance(Open)
2. Check the IGBT
Sensor(Short)
1. Check the CN71 Con-
nect
1. Check the CN71 Con-
nect
Replace the INVERTER
PCB
Check The voltage of
Power Concent
1. Check the Electrical
Wiring
2. Replace the Box Fan
Check Point
Follow the CF1,CF2,CF3,CF4 Flow
Chart Based on the Surface Element
Position
Follow the CF5,CF6 Flow Chart Based
on the Surface Element Position
Follow the CF7,CF8 Flow Chart Based
on the Surface Element Position
1. Wiring : Check the Connection for
Box fan.
2. Replace the Part : Change the box
fan (See page 3-15)