LG MULTI V 5 Manual Book page 71

Error No. Error Type Error Point
Error No. Error Type Error Point
193*
Master
1931
Slave1
Fan PCB Heatsink Heatsink Temperature
Fan PCB Heatsink Heatsink Tempera-
1932
193*
Temperature High is Over 90°C
Slave2 Temperature High ture is Over 90℃
1933
Slave3
1934
n Error diagnosis and countermeasure flow chart
Error Diagnosis and Countermeasure Flow Chart
▒
1. Check Pipe Clogging/ Distortion
2. Check Covering (Outdoor/Indoor Unit)
No
Is Installation 3. Check EEV Connector Assemble Condition/Normal Operation
4. Check Refrigerant Pressure
Condition Normal?
5. Check Power Wire/ Connection Condition
Reassemble or Manage if abnormality Found
Yes
No
Fan PCB IPM Connection 1. Check Fan PCBA Screw Connection Condition
Condition Normal? Reassemble or Manage if abnormality Found
Yes
No
1. Check Outdoor Unit Fan Motor Operation or Lock
Is ODU Fan Motor Normal?
Reassemble or Manage if abnormality Found
Yes
No
Is Fan PCB assembly 1. Reset
Normal? Replace Fan PCB Assembly
Yes
Recheck Power and
Installation Condition
n Check Fan PCB Screw Connection Condition
Check Screw Connection Condition
Copyright ©2017 LG Electronics. Inc. All right reserved.
Only for training and service purposes
140
_TROUBLE SHOOTING GUIDE BOOK
Main Reasons
Main Reasons
1. Fan PCBA IPM Connection Condition Ab-
1. Fan PCBA IPM Connection Condition Abnormal
normal
2. Outdoor Unit Fan Motor Operation Abnormal
2. Outdoor Unit Fan Motor Operation Abnormal
3. Outdoor Unit Fan PCB Assembly Defect
3. Outdoor Unit Fan PCB Assembly Defect
4. Overload Operation (Pipe Clogging/ Covering/EEV
4. Overload Operation (Pipe Clogging/ Cover- Defect/Ref. Overcharge)
ing/EEV Defect/Ref. Overcharge)
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LGE Internal Use Only
Error No. Error Type Error Point
194*
Master
1941
Error No. Error Type Error Point
Outdoor unit Fan PCB Outdoor unit Fan PCB
Slave1
1942 heatsink temperature heatsink temperature
Outdoor unit Fan Outdoor unit Fan
Slave2 sensor error sensor error
PCB heatsink PCB heatsink
1943
194*
Slave3
temperature sensor temperature sensor
1944
error error
n Error diagnosis and countermeasure flow chart
Error Diagnosis and Countermeasure Flow Chart
▒
Is temperature sensor
No
Check and correct connection
connector connections
are normal?
Yes
No
Is the value of temperature
Replace sensor
sensor resistance normal?*
Yes
Replace outdoor unit PCB
* Sensor resistance 100 kΩ over (open) or 100 Ω below (short) will generate error
Note: Temperate sensor resistance vary with temperature, So compare temperature sensor resistance value
according to outdoor unit temperature by referring below table (±5% tolerance)
Air temperature sensor: 10°C = 20.7kΩ : 25°C = 10kΩ : 50°C= 3.4kΩ
Pipe temperature sensor: 10°C = 10kΩ : 25°C = 5kΩ : 50°C= 1.8kΩ
* 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. Defective temperature sensor connection
2. Defective temperature sensor (Open / Short)
3. Defective outdoor unit PCB
1. Defective temperature sensor connection
2. Defective temperature sensor(Open / Short)
3. Defective outdoor unit PCB
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LGE Internal Use Only
141
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