Troubleshooting Guide
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Only for training and service purposes
LGE Internal Use Only
1.EEPROM bad contact/wrong insertion
2.EEPROM Version is different
3.ODU fan PCB assembly damage
Error No. Error Type Error Point Main Reasons
Error occurs when checking the
EEPROM checksum as initializing
after power is supplied
Fan PCB EEPROM
Error
87*
Master 871
Slave1 872
Slave2 873
Slave3 874
n Error Diagnosis and Countermeasure Flow Chart
Is EEPROM insertion normal?
1.Check EEPROM insertion direction/connection condition
2.Check EEPROM checksum
→ Replace EEPROM if abnormality found
Yes
No
Recheck power and
installation condition
Is Fan PCB assembly normal?
Yes
No
Replace fan PCB assembly
Inverter EEPROM insertion
direction
Same direction both socket
Check IC02L
hole and EEPROM hole
❈ Note : Replace after power off
Check IC02L
1 Fan 2 Fan
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