LG MULTIV III - Page 39

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Only for training and service purposes
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Self-diagnosis function
• Defective temperature sensor connection
• Defective temperature sensor
(Open/Short)
• Defective outdoor unit PCB
Error No. Error type Error point Main reasons
Abnormal value of sensor
measurement (Open / Short)
HR unit liquid pipe tem-
perature sensor error
201C#HR
• Defective temperature sensor connection
• Defective temperature sensor
(Open/Short)
• Defective outdoor unit PCB
Error No. Error type Error point Main reasons
Abnormal value of sensor
measurement(Open / Short )
HR unit
Sub-cooling inlet pipe
temperature sensor
error
202C#HR
• Defective temperature sensor connection
• Defective temperature sensor
(Open/Short)
• Defective outdoor unit PCB
Error No. Error type Error point Main reasons
Abnormal value of sensor
measurement(Open / Short)
HR unit
Sub-cooling discharge
pipe temperature sensor
error
203C#HR
■ Error diagnosis and countermeasure flow chart
■ HR unit error display No.
■ Example of HR unit error display.
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
#16 HR unit Sub-cooling inlet pipe temperature sensor error 200 ➔ C16 (Repeat)
C: HR unit
#: HR unit Nuber
HR Unit
Error display
HR #1 HR #2 HR #3 HR #4 HR #5 HR #6 HR #7 HR #8 HR #9 HR #10 HR #11 HR #12 HR #13 HR #14 HR #15 HR#16
C01 C02 C03 C04 C05 C06 C07 C08 C09 C10 C11 C12 C13 C14 C15 C16