LG ACHH Series Manual page 74

Error code check
Error number
Inverter compressor
41
discharge pipe tempera-
(411)
ture sensor error
n Failure diagnosis method
Is a sensor normally
connected to PCB?
Yes
Is a resistance value of a
sensor normal? [Note 1]
Yes
Are a MV phase
temperature value and a
sensor resistance value
agreed?
Yes
Correspond sensor
replacement
[Note 1] An error occurs in case of more than 5 MΩ (Open) or less than 2 kΩ (Short)
Reference: A discharge 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)
Errors
Resistance measurement
value of a sensor is
abnormal (Open/Short)
No
Insert a sensor to PCB
No
Sensor replacement
No
Correspond outdoor unit PCB
replacement
Inverter 1 discharge temperature
Inverter 2 discharge temperature
Meaning
1. Compressor discharge pipe temperature sensor
connector connection defect
2. Compressor discharge pipe temperature sensor
defect (Open/Short)
3. Outdoor unit PCB defect
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Main cause of occurrence