LG MULTIV III Service Manual page 39

Error No.
HR unit liquid pipe tem-
201C#HR
perature sensor error
Error No.
HR unit
Sub-cooling inlet pipe
202C#HR
temperature sensor
error
Error No.
HR unit
Sub-cooling discharge
203C#HR
pipe temperature sensor
error
■ Error diagnosis and countermeasure flow chart
1) Check connection condition of temperature sensor and lead cable
2) Is value of temperature sensor normal? If not replace sensor
- Piping temperature sensor : 10°C = 10kΩ : 25°C= 5kΩ : 50°C= 1.8kΩ
3) If connection of sensor and value is correct, replace outdoor unit PCB
■ HR unit error display No.
HR Unit HR #1 HR #2 HR #3 HR #4
Error display C01 C02
■ Example of HR unit error display.
#16 HR unit Sub-cooling inlet pipe temperature sensor error 200 ➔ C16 (Repeat)
C: HR unit
#: HR unit Nuber
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Only for training and service purposes
Error type
Abnormal value of sensor
measurement (Open / Short)
Error type
Abnormal value of sensor
measurement(Open / Short )
Error type
Abnormal value of sensor
measurement(Open / Short)
HR #5 HR #6 HR #7
C03 C04 C05 C06
Error point
• Defective temperature sensor connection
• Defective temperature sensor
(Open/Short)
• Defective outdoor unit PCB
Error point
• Defective temperature sensor connection
• Defective temperature sensor
(Open/Short)
• Defective outdoor unit PCB
Error point
• Defective temperature sensor connection
• Defective temperature sensor
(Open/Short)
• Defective outdoor unit PCB
HR #8 HR #9 HR #10 HR #11 HR #12 HR #13 HR #14 HR #15 HR#16
C07 C08 C09 C10
- 39 -
Self-diagnosis function
Main reasons
Main reasons
Main reasons
C11 C12 C13 C14
LGE Internal Use Only
C15 C16