Control Parts - LG AB-H1208VA0 Service Manual

Troubleshooting Guide

3. Control Parts

1) Troubleshooting CH10
• When CH10 error occurs , check error indication LED on FAN BOARD.
Fan board
Title
Error LED
10
BLDC Fan Lock
IPM Fault (Over
21
current)
CT 2
22
(Max.Current)
23
DC Link Low Volt
CT Circuit
40
OPEN/SHORT
EEPROM Check
60
Sum Error
2) Troubleshooting CH15
Fan board
Title
Error LED
Communication
52
Error
Cause of error
• Mechanical Locking
• Miss connection
• Mechanical Locking
• Miss connection
• Instant over current
• Over Rated current
• Poor insulation of IPM
• Over current (6A°Ë)
• DC link volt. is 280Vdc°È.
• Faulty sensor ( CT
Open/short )
• Malfunction of External
power
• Check sum error
Cause of error
• Connector connection error
• Faulty PCB
• Connection wire break
- 11 -
Check point
• The abnormal connection of Hall sensor
• The abnormal connection of U,V,W
• Mechanical Locking of Fan
• Miss connection
- The abnormal connection of Hall sensor
- The abnormal connection of U,V,W
• Instant Overcurrent.
- RMS current 20AÆ
- Peak current 24AÆ
• Poor insulation of Fan
• Overload
- Mechanical Locking of Fan
• Check the overload condition
- Mechanical Locking of Fan
• Check the drop of power source
• Check the power source.
• Check the components.
• Malfunction of current detection circuit.
(Open / Short)
• The voltage of "C01N" Is 4.0Vdc (20A)Æ .
• Check the drop of power source .
• Check the connection port.
• Check the poor soldering.
Check point
• Connection of wire
• Noise interference