LMN248HVT Installation Guide

49
Installation Manual
Due to our policy of continuous product innovation, some specifications may change without notification.
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MA
X
MUL
TI
F
MUL
TI
F
Troubleshooting Using Error Codes
Refer to Table 28 for information on error codes generated from the
indoor and outdoor units. These codes are the most common for
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 repair the system
yourself.
Error Codes
• Figure 70 shows typical indoor unit LEDs used for error code
display.
• 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 re-
mote controller, the 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 the 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 identication,
size, and factory dened default component operating param-
eters are stored.
Figure 70: Typical Indoor Unit LEDs for Error Code Display
Error
Code
Description
Number of Times Indoor Unit
LEDs Blink
LED 2
(Heating LED)
LED 1
(Cooling 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 1X 2X
Table 28: Multi Zone Wall-Mounted Indoor Unit Error Codes
TROUBLESHOOTING
Cooling
Heating
Preheating
LED 1
LED 2