58
Multi F Standard Wall-Mounted Indoor Unit
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MAX
MUL
TI
F
MULTI
F
Troubleshooting Using Error Codes
Refer to the table below for error codes that are generated from the
indoor units (see the Multi F / Multi F MAX Outdoor Unit Installation
Manual for outdoor unit error codes). These codes are the most
common. Your particular system might generate additional codes
not listed here. Please contact LG Support if you see these types of
errors and a simple power cycle has not corrected the issue.
Error Codes
• Indicate different types of unit failures, assists in self-diagnosis and
to track the frequency of occurrence.
• Error codes are displayed on indoor unit LEDs, wired remote con-
trollers, the outdoor unit PCB, and through the SIMS app and LG
Monitoring View (LGMV) diagnostic software. Also, check the wired
UHPRWHFRQWUROOHUGLVSOD\¿UVWIRUHUURUFRGHVLISUHVHQW
• If two or more errors occur simultaneously, the lower error code
number is displayed first.
• After the error is resolved, the error code does not display.
(UURU&RGHV
Decoding the Error Display
The first and second number on the LED indicates error number. Ex-
ample: 21 = LED1 (Green light) 2x blink, LED2 (Red light) 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.
Error
Code
Description
Number of Times Indoor Unit
LEDs Blink
LED 2 LED 1
1 Indoor unit room temperature sensor error
-1X
2 Indoor unit inlet pipe sensor error - 2X
4 Float switch error (optional) - 4X
5 Communication error between indoor unit and outdoor units - 5X
6 Indoor unit outlet pipe sensor error - 6X
9 Indoor unit EEPROM error - 9X
10 Indoor unit BLDC motor fan lock 1X -
12 Indoor unit middle pipe sensor error 1X 2X
Table 19: Multi Zone Wall-Mounted Indoor Unit Error Codes
TROUBLESHOOTING
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