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Troubleshooting Using Error Codes
Refer to the tables below and on the next page for information on the error codes that are generated from the indoor and outdoor units.
These codes are the most common that will manifest through these units. The system installed might generate additional codes not listed
here. Contact an LG trained service provider if these types of errors are seen, and a simple power down and boot up has not corrected the
issue. The end user should not attempt to fix the system.
Error Codes
• Error codes indicate different types of unit failures, assist in self-diagnosis and to
track the frequency of occurrence.
• Error codes are shown on the LEDs of indoor units, wired remote controller, the
outdoor unit control board, and LG Monitoring View (LGMV) Diagnostic Software,
depending on the system installed.
• If two or more errors occur simultaneously, the error code with the larger issue is
displayed first.
• To resume system operation after an error code is resolved, cycle the power off,
then back on.
• After error is resolved, the error code does not display.
Decoding the Error Display
The first and second number on the LED indicates error number. Example: 21 = LED1 2x blink, LED2 1x blink.
Error Code Nomenclature Definitions
• MICOM: Non-volatile memory chip where unit setup information is stored.
• EEPROM: Non-volatile memory chip where device identification, size, and factory defined default component operating parameters are
stored.
WARNING
after three (3) minutes.
Table 33: Mid-Static Ducted Indoor Unit Error Codes.
Error Code
Description
Indoor Unit Room Air Temperature
01
Room Sensor Error
02
Indoor Unit Inlet Pipe Sensor Error
03
Remote Controller Error
04
Drain Pump Error
Communication Error Between
05
Indoor Unit and Outdoor Unit
Indoor Unit Outlet Pipe Sensor
06
09
Indoor Unit EEPROM Error
10
Indoor Unit BLDC Motor Fan Lock
FINAL INSTALLATION PROCEDURES
Indoor unit air temperature sensor is disconnected,
Indoor unit inlet pipe temperature sensor is
disconnected, shorted, or opened.
Indoor unit PCB is not receiving a signal from the
wired remote controller (if installed).
Indoor unit PCB is not receiving signal from outdoor
Indoor unit outlet pipe temperature sensor is
Error
disconnected, shorted, or opened.
Indoor unit EEPROM serial number marked on is 0
Indoor unit fan motor connection is disconnected.
Indoor unit fan motor lock has failed.
Due to our policy of continuous product innovation, some specifications may change without notification.
©LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. "LG" is a registered trademark of LG Corp.
Figure 106: Wired Remote Controller Display.
Details
shorted, or opened.
Drain pump malfunction.
unit.
or FFFFFF.
Error Codes
Indoor Unit Operation Status
Off
Off
Off
Off
Off
Off
Off
Off
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