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49
Installation Manual
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.
MA
X
MUL
TI
F
MUL
TI
F
Troubleshooting Using Error Codes
Refer to Table 27 for information on error codes generated 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 gures below for your particular indoor unit’s LED
conguration.
• 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 rst.
• After error is resolved, the error code does not display.
Error Codes
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 identication,
size, and factory dened default component operating param-
eters are stored.
LED 1
(UNITS PLACE)
LED 2
(TENS PLACE)
Receiver
Figure 72: IDU LS-HSV4 Models
Error
Code
Description
No. of Times Indoor Unit
LEDs Blink
LED1
(Plasma LED)
LED2
(Power LED)
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 EPROM error 9X -
10 Indoor unit BLDC motor fan lock - 1X
12 Indoor unit middle pipe sensor error 2X 1X
Table 27: Multi Zone Wall-Mounted Indoor Unit Error Codes
TROUBLESHOOTING
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