LG ARUN Series Service Manual page 124

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