LG MULTI V 5 Manual Book page 65

Error No. Error Type Error Point
Error No. Error Type Error Point
Error occurs when
87*
checking the
Error occurs when checking the
Master 871
Fan PCB EEPROM
Fan PCB EEPROM
87* EEPROM checksum
Slave1 872
EEPROM checksum as initializing
Error
Error
Slave2 873 as initializing after
after power is supplied
Slave3 874
power is supplied
n Error Diagnosis and Countermeasure Flow Chart
1.Check EEPROM insertion direction/connection condition
No
Is EEPROM insertion normal? 2.Check EEPROM checksum
→ Replace EEPROM if abnormality found
Yes
No
Is Fan PCB assembly normal? Replace fan PCB assembly
Yes
Recheck power and
installation condition
Check IC02L
Inverter EEPROM insertion
direction
Same direction both socket
hole and EEPROM hole
❈ Note : Replace after power off
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
128
_TROUBLE SHOOTING GUIDE BOOK
Main Reasons
Main Reasons
1. EEPROM bad contact/wrong insertion
1.EEPROM bad contact/wrong insertion
2. EEPROM Version is different
2.EEPROM Version is different
3. ODU fan PCB assembly damage
3.ODU fan PCB assembly damage
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LGE Internal Use Only
Error No. Error Type Error Point
104*
Error No. Error Type Error Point
Master
1041
Master displays ODU number Master displays ODU
Communication
Slave1
which is not communicated.
Communication number which is
1042 Error Between
Slave displays own error number
Slave2
104* Error Between Outdoors not communicated.
1043
Outdoors Slave displays own
Slave3
1044 error number
n Error Diagnosis and Countermeasure Flow Chart
Is communication
No
cable installed Connect communication cable
normally?
Yes
No
Is Slave Unit Dip SW
Dip SW setting
setting done?
Yes
No
Is Main PCB power
Connect power cable
supplied?
Yes
Replace Main PCB
* Measuring input voltage
* Noise filter wiring
R(L1) S(L2) T(L3) N
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Main Reasons
Main Reasons
1.Loose connection of power cable/ communi-
cation cable¸(Open/Short)
1. Loose connection of power cable/ com-
2.Defect of each outdoor unit PCB
munication cable (Open/Short)
2. Defect of each outdoor unit PCB
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LGE Internal Use Only
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