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Due to our policy of continuous product innovation, some specifications may change without notification.
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TROUBLESHOOTING
Troubleshooting Using Error Codes
Refer to Table 35 and Table 36 for error codes that are generat-
ed 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
• 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.
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 parameters
are stored.
Receiver
LED 1
(UNITS PLACE)
LED 2
(TENS PLACE)
LED 1
(UNITS PLACE)
LED 2
(TENS PLACE)
Receiver
Figure 116: IDU LS-HSV3 Models
Figure 117: IDU Some HSV Models
Figure 118: IDU LS-HV3/Some HSV Models
LED 2
(TENS PLACE)
Receiver
LED 1
(UNITS PLACE)
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 35: Single Zone Wall Mounted Indoor Unit Error Codes
LED 1
(UNITS PLACE)
LED 2
(TENS PLACE)
Receiver
Figure 119: IDU LS-HEV, HEV1 Models
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