Display
Title
code
Indoor BLDC Fan Motor
10
Lock
Check Point
Check the PCB during the Power on
1. Check the Voltage Red line to Black line
' The Voltage is about [input voltage x 1.414]
' if the Voltage does not come with the above Voltage,
' Check the power input
' Replace the PCB & Motor
2. Check the Voltage Black line to White
' the Voltage is DC 15V
' Check the Power input
' Replace the motor
Check the Motor
1. Check the shaft
' if the shaft is not turn smoothly, the Motor Power IC is defected
' replace the motor
2. Check the motor resistance(if the shaft is turn smoothly, check the resistance)
' Check Red line to Black line, Blue line to Black line
' The resistance should infinite
' replace the motor
Copyright ©2013 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Cause of error
The Fan is not operated
properly
White
Yellow
Blue
Black Red
Check point & Normal condition
Check the Indoor fan locking
Fan motor
connector
Tester
- 54 -
Part 4 Trouble Shooting
LGE Internal Use Only