Self-Diagnosis Function - LG ATNH126ELFB Service Manual

Self-diagnosis Function

Error Indicator
The function is to self-diagnoisis airconditioner and express the troubles identifically if there is any trouble.
If more than two troubles occur simultaneously, primarily the highest trouble fo error code is expressed.
After error occurrence, if error is released, error LED is also released simultaneously.
Having or not of error code is different from Model.
ERROR display
• Error display method is classified depending on method and frequencies of flickering as example:
ex) ERROR CODE = 45
Number of "10" cipher "4"= Flickers lengthily 4 times.
Number of "1" cipher "5"= Flickers shortly 5 times.
Type and code of indoor unit error
[ERROR CODE]
No Error .......................................................................................................................................................01
Indoor Room themistor error .......................................................................................................................01
Indoor in-piping sensor error .......................................................................................................................02
Remote controller error................................................................................................................................03
Drain Pump error .........................................................................................................................................04
Communcation error between in and out ....................................................................................................05
Indoor Out-Piping sensor error ....................................................................................................................06
Different mode operation .............................................................................................................................07
Type and code of outdoor unit error
[ERROR CODE]
Outdoor unit, outdoor temperature Thermister open/short .........................................................................44
Outdoor unit pipe temperature Thermister open/short ...............................................................................45
Excess of capacity (inconsistency with option capacity setup in outdoor unit)............................................51
Communication between indoor unit and outdoor unit in-available ..............................................................5
D-Pipe Temperature High
D-Pipe thermister open/short ......................................................................................................................47
Outdoor unit suction temperature Thermister open/short ...........................................................................48
Countermeasure of error occurred
1) For error as described in above item
Transmits error code to the indoor unit.
2) For error as described in above item 4): Transmits error code to the indoor unit
• For thermister error, error terminates after powering off.
• Excess of capacity (Where capacity of the outdoor unit differs from capacity of the indoor unit Error display)
3) Error of the discharge temperature sensor is processed in following method:
For sensor open process, check 4 minutes after COMP operation and 10 minutes after power application.
For short process, check and process from the time when power is applied.
...............................................................................................33
~ , ): Stops operation of the outdoor unit
Troubleshooting Guide
Service Manual 99