LG MULTI V 5 Manual Book page 62

Error No. Error Type Error Point
Error No. Error Type Error Point
Fan RPM is 10RPM
67*
or less for 5 sec.
Fan RPM is 10RPM or less
67* Fan Lock Error when ODU fan starts
for 5 sec. when ODU fan
Master 671
Fan Lock Error or 40 RPM or less
Slave1 672 starts or 40 RPM or less
after fan starting.
after fan starting.
Slave2 673
Slave3 674
n Error Diagnosis and Countermeasure Flow Chart
No Check ODU Fan Motor assemble condition and fan locking
Is ODU Fan Motor Assemble
→ Reassemble or replace if abnormality found
condition normal?
Yes
1. Check resistance between each phase(U,V,W) of ODU
No
Is ODU Fan Motor normal?
2. Check insulation resistance between ODU fan motor
→ Replace fan motor if abnormality found
Yes
Check wiring between ODU fan motor and fan PCB
Is wire connection of No
( Check if and Motor output terminal color is matched)
ODU Fan Motor wire normal?
→ Reassemble if abnormality found
Yes
No
Replace Fan PCB assembly
Is Fan PCB assembly normal?
Yes
Recheck power and installation condition
* Fan Motor resistance measuring * Fan motor wire connection
between each phase
❈ When it has heavy snowfall, remove from product and then operate.
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
122
_TROUBLE SHOOTING GUIDE BOOK
Main Reasons
Main Reasons
1. Fan motor defect / assembly condition
abnormal 1. Fan motor defect / assembly condition
abnormal
2. Wrong connection of fan motor connector
2. Wrong connection of fan motor connector
(U,V,W output)
(U,V,W output)
3. Reversing rotation after RPM target apply
3. Reversing rotation after RPM target apply
4. Fan PCB assembly defect
4. Fan PCB assembly defect
5. Fan lock by Heavy Snowfall.
5. Fan lock by Heavy Snowfall.
fan motor terminal (16.8 Ω ±5% at 75°...)
terminal(U,V,W)
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LGE Internal Use Only
Error No. Error Type Error Point
Error No. Error Type Error Point
Micom input volt-
71*
age isn't within
Micom input voltage
PFC CT Sensor
Master 711
71* 2.5V±0.3V at initial
isn't within 2.5V±0.3V
Error
Slave1 712 PFC CT Sensor Error
at initial state of power state of power
Slave2 713
supply
supply
Slave3 714
n Error diagnosis and countermeasure flow chart
1. Check R/S/T/N wiring conditions
No
Are there any power wire
2. Check noise filer wiring conditions
Connections normal?
Rewire them if abnormality found
Yes
Check
No
R~S/S~T/T~R phase voltage 380V±10%
Is input voltage normal?
R~N/S~N/T~N phase voltage 200V±10%
Check connection condition and wiring if power is abnormal
Yes
No
Is Inverter PCB
1. Replace Inverter PCB
Assembly normal?
Yes
Recheck Power and
Installation Condition
* Measuring input voltage * Inverter PCB
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. Input Voltage is abnormal (R-N)
1. Input Voltage is abnormal (R-N)
2. ODU Inverter PCB damage (CT sensing part)
2. ODU Inverter PCB damage (CT sensing part)
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LGE Internal Use Only
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