Error Codes - LG MULTI F LMU18CHV Installation Manual

F
MULTI
F
MULTI MAX
Troubleshooting Using Error Codes
Refer to Tables 44 and 45 for error codes that are generated from
the indoor and outdoor units. These codes indicate different types of
unit failures, assist in self-diagnosis, are the most common that will
manifest through these units. Error codes are displayed on indoor unit
LEDs, wired remote controllers, the outdoor unit PCB, and through LG
Monitoring View (LGMV) diagnostic software.
Systems may generate additional codes not listed here. Contact LG
Support if these types of errors are seen and a simple power down and
boot up has not corrected the issue. Do not attempt to fix the system
yourself.
• If two or more errors occur simultaneously, the highest error code
• After error is resolved, the error code does not display.
Decoding the Error Display
See images and table below for indoor unit error codes, location of
LEDs, and operation status.
The first and second number on the LED indicates error number. Ex-
ample: 21 = LED1 (Red light) 2x blink, LED2 (Green light) 1x blink.
Error Code Nomenclature Definitions
• MICOM: Non-volatile memory chip where unit setup information is
stored.
• EPROM: Non-volatile memory chip where device identification, size,
and factory defined default component operating parameters are
stored.
Table 44: Indoor Unit Error Codes.
Error Code
00
01
02
03
04
05
06
07
09
10
Description
No error
Indoor unit room temperature sensor error
Indoor unit inlet pipe sensor error
Controller error
Drain pump error (optional)
Communication error between indoor unit and outdoor units
Indoor unit outlet pipe sensor error
Different mode operation error
Indoor unit EPROM error
Indoor unit BLDC motor fan lock
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
Figure 104: Standard Wall-Mounted Indoor Unit LEDs.
Figure 105: Art Cool Mirror Wall-Mounted Indoor Unit
LEDs.
Figure 106: Ceiling Cassette Indoor Unit LEDs.
Number of Blinks = Error Code
Indoor Unit Operation Status

Error Codes

LED 1
(UNITS PLACE)
LED 2
(TENS PLACE)
Receiver
Receiver
LED 1
(UNITS PLACE)
LED 2
(TENS PLACE)
LED 2: Tens Place LED 1: Units Place
ON
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
OFF
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