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F
MULTI
F
MULTI
MAX
Troubleshooting Using Error Codes
Refer to Table 27 for information on the error codes that are gener-
ated from the indoor and outdoor units. These codes are the most
common that will manifest through these units. Your particular model
duct free system might generate additional codes not listed here.
Please contact LG Support if you see these types of errors and a
simple power down and boot up has not corrected the issue. You
should not attempt to fix the system yourself.
Error Codes
• Refer to the figures below for your particular indoor unit's LED
configuration.
• 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 Single Zone 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.
Error
Code
1
Indoor unit room temperature sensor error
2
Indoor unit inlet pipe sensor error
4
Float switch error (optional)
5
Communication error between indoor unit and outdoor units
6
Indoor unit outlet pipe sensor error
9
Indoor unit EPROM error
10
Indoor unit BLDC motor fan lock
12
Indoor unit middle pipe sensor error
Table 27: Multi Zone Wall-Mounted Indoor Unit Error Codes
Description
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 (Green light) 2x blink, LED2 (Red 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 param-
eters are stored.
Figure 70: Example of IDU LEDs
(Plasma LED)
1X
2X
4X
-
6X
9X
-
2X
Error Codes
LED 1
(UNITS PLACE)
LED 2
(TENS PLACE)
Receiver
No. of Times Indoor Unit
LEDs Blink
LED1
LED2
(Power LED)
-
-
-
5X
-
-
1X
1X
49
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