Troubleshooting; Error Codes - LG MULTI F Installation Manual

F
MULTI
F
MULTI MAX
Troubleshooting Using Error Codes
Refer to the table 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 cor-
rected the issue. The end user should not attempt to fix the system.

Error Codes

• Error codes indicate different types of unit failures, assists 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.
• If two or more errors occur simultaneously, the lower error code
number is displayed first.
• After error is resolved, the error code does not display.
Table 22: Multi Zone Ceiling Cassette Indoor Unit Error Codes.
Error
Code
1
2
4
5 Communication error between indoor unit and outdoor units
6
9
10
12
Description
Indoor unit room temperature sensor error
Indoor unit inlet pipe sensor error
Float switch error (optional)
Indoor unit outlet pipe sensor error
Indoor unit EEPROM error
Indoor unit BLDC motor fan lock
Indoor unit middle pipe sensor error
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.

TROUBLESHOOTING

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.
Figure 67: Example of Ceiling Cassette IDU LEDs (appearance will differ
depending on model).
Error Codes
LED 2: Tens Place LED 1: Units Place
Number of Blinks = Error Code
No. of Times Indoor Unit
LEDs Blink
LED 1 LED 2
1X -
2X -
4X -
- 5X
6X -
9X -
- 1X
2X 1X
47