LG Multi V 5 - Page 65

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_TROUBLE SHOOTING GUIDE BOOK _
- 144 -
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
1.Loose connection of power cable/ communi-
cation cable¸(Open/Short)
2.Defect of each outdoor unit PCB
Error No. Error Type Error Point Main Reasons
Master displays ODU number
which is not communicated.
Slave displays own error number
Communication
Error Between
Outdoors
104*
Master
1041
Slave1
1042
Slave2
1043
Slave3
1044
n Error Diagnosis and Countermeasure Flow Chart
Is communication
cable installed
normally?
Connect communication cable
Yes
No
Is Slave Unit Dip SW
setting done?
Yes
Dip SW setting
No
Is Main PCB power
supplied?
Yes
Connect power cable
No
Replace Main PCB
* Measuring input voltage
* Noise filter wiring
R(L1) S(L2) T(L3) N
Error No. Error Type Error Point Main Reasons
104*
Communication
Error Between
Outdoors
Master displays ODU
number which is
not communicated.
Slave displays own
error number
1. Loose connection of power cable/ com
-
munication cable (Open/Short)
2. Defect of each outdoor unit PCB
- 143 -
Copyright ©2017 LG Electronics. Inc. All right reserved.
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
hole and EEPROM hole
❈
Note : Replace after power off
Check IC02L
Error No. Error Type Error Point Main Reasons
87*
Fan PCB EEPROM
Error
Error occurs when
checking the
EEPROM checksum
as initializing after
power is supplied
1. EEPROM bad contact/wrong insertion
2. EEPROM Version is different
3. ODU fan PCB assembly damage
Basic Part
Multi V 5
Intorduction
Trouble Shooting
Function Control
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