LG MULTI V 5 Manual Book page 64

Error No. Error No. Error Type Error Type Error Point Error Point
79*
Master 791
Fan Starting Failure Fan Motor initial
Fan Starting Failure
79*
Slave1 792 Fan Motor initial starting failure
Error starting failure
Error
Slave2 793
Slave3 794
n Error Diagnosis and Countermeasure Flow Chart
No
Is fan motor assemble
Check ODU fan motor assemble condition and locking
condition normal? → Reassemble or replace if abnormality found
Yes
1.Check resistance between each motor output terminal
Are the resistance No
Chassis
Between each phase and insulation
resistance of motor output Resistance
terminal normal?
2. Check insulation resistance between ODU fan motor terminal(U,V,W) and pipe (over 100M )
→Replace fan motor if abnormality found
No
Is fan motor connection
1. Check if color of motor output terminal(U,V,W) connector matched with PCB's
condition normal?
2. Check wire disconnection and wiring
→ Reassemble or replace if abnormality found
No
Check fan PCB assembly IPM normal
Is fan PCB assembly normal?
→ Replace Fan PCB assembly
Yes
Recheck power and
installation condition
Measuring fan motor Measuring insulation resistance
phase resistance between fan terminal & chassis
Check the connetion condition
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
126
_TROUBLE SHOOTING GUIDE BOOK
Main Reasons Main Reasons
1. Fan motor defect/ assemble condition
1.Fan motor defect/ assemble condition abnor-
abnormal
mal
2. Fan motor connector misconnection(U,V,W
2.Fan motor connector misconnection(U,V,W
ouput)
ouput)
3. Fan PCB defect
3.Fan PCB defect
UXA UXB
15 ± 7 % Ω 13 ± 7 % Ω
Check
Point
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LGE Internal Use Only
Error No. Error Type Error Point
86*
Error No. Error Type Error Point
Master 861
Slave1 862 Main PCB EEPROM EEPROM Access Error
EEPROM Access
Slave2 863
86* Main PCB EEPROM
Error
Slave3 864
n Error Diagnosis and Countermeasure Flow Chart
No
Is EEPROM assemble
Reset after checking EEPROM assemble condition
condition normal?
Yes
No
Replace Correct EEPROM
Correct check sum
Yes
Recheck power and
installation condition
EEPROM Insertion
EEPROM
* Note : Replace after power off
Same direction both socket hole
and EEPROM hole
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Main Reasons
Main Reasons
1. No EEPROM
1. No EEPROM 2. EEPROM wrong insertion
2. EEPROM wrong insertion
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LGE Internal Use Only
127
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