Error Code Check - LG ACHH Series Manual

8. Error code check

Error number
01 Air temperature sensor error
n Failure diagnosis method
Is a sensor normally
connected to Chiller board ?
Yes
Is the resistance value
of a sensor normal?
[Note 1]
Yes
Chiller board
replacement
[Note 1] An error is occurred in case of more than 100 kΩ (Open) or less than 100 Ω (Short)
Reference: A temperature sensor is normal if a resistance value changes depending upon the temperature and next resistance
value is shown based on the current temperature (±5% deviation)
Air temperature sensor: 10 ℃ = 20.7 kΩ : 25 ℃ = 10 kΩ : 50 ℃ = 3.4 kΩ
Pipe temperature sensor: 10 ℃ = 10 kΩ : 25 ℃ = 5 kΩ : 50 ℃ = 1.8 Kω
UI1,G : Air temperature sensor
Errors
No
Insert a sensor connector
to Chiller board
No
Sensor replacement
Temperature sensor resistance measurement
- 55 -
Meaning
1. Sensor connector~ Chiller board
Temperature sensor
Open/Short 2. Chiller board defect
3. Sensor defect (Main cause)
Error code check
Main cause of occurrence
contact defect