Lg La120hsv, La090hsv Owner's Manual
DEFINING COMMON ERROR CODES
Art Cool™ Mirror High-Efciency Single Zone Systems
LA090HSV System (LAN090HSV Indoor Units / LAU090HSV Outdoor Units)
LA120HSV System (LAN120HSV Indoor Units / LAU120HSV Outdoor Units)
LAN090HSV and LAN120HSV Indoor Units
Location of light-emitting
diode (LED) displays
LED2
LED1
Error
Code
1 Indoor unit return air thermistor is disconnected or is shorted out. 1X —
2 Indoor unit inlet pipe thermistor is disconnected or is shorted out. 2X —
5 Communication failure from indoor unit to outdoor unit. — 5X
6 Indoor unit outlet pipe thermistor has disconnected or has shorted out. 6X —
9 Indoor unit electrically erasable programmable read-only memory (EEPROM) error. 9X —
10 Indoor unit fan has locked up (fan motor operation failure). — 1X
12 Indoor unit middle pipe thermistor is disconnected or is shorted out. 1X 2X
21
22 Current transformer2 (CT2) error; alternating current (AC) input is too high. 2X 2X
23 DC link voltage is too low. 2X 3X
25 Voltage to the system is too low or too high. 2X 5X
26 Inverter compressor has seized up or is not providing rotation. 2X 6X
Prospective short circuit (PSC) fault error; current to inverter compressor between
27
28 Inverter compressor DC voltage is too high. 2X 8X
29 Inverter compressor amperage is too high. 2X 9X
31 Current to the current transformer (CT) thermistor is too low. 3X 1X
32 Inverter compressor discharge pipe temperature is too high. 3X 2X
40 Current transformer (CT) thermistor is disconnected or is shorted out. 4X —
41 Inverter compressor discharge pipe thermistor is disconnected or is shorted out. 4X 1X
44 Outdoor unit inlet air thermistor is disconnected or is shorted out. 4X 4X
45 Middle thermistor of outdoor unit condenser coil is disconnected or is shorted out. 4X 5X
46 Outdoor unit suction line thermistor is disconnected or is shorted out. 4X 6X
48 Outdoor unit coil outlet (liquid line) thermistor is disconnected or is shorted out. 4X 8X
53 Communication failure from outdoor unit to indoor unit. 5X 3X
60 Outdoor unit printed circuit board (PCB) EEPROM check sum error. 6X —
61 Outdoor unit condenser coil temperature is too high. 6X 1X
62 Outdoor unit inverter compressor PCB heat sink temperature is too high. 6X 2X
63 Condenser coil pipe thermistor temperature is too low. 6X 3X
65 Heat sink thermistor has disconnected or has shorted out. 6X 5X
67 Outdoor brushless direct current (BLDC) fan motor lock error. 6X 7X
Direct current (DC) peak error / internal power module (IPM) fault;
compressor DC voltage was too high.
AC and DC converter circuit is too high.
Description
No. of Times Indoor Unit LEDs Blink
LED1
(Plasma LED)
2X 1X
2X 7X
(Power LED)
LED2
Defining Commom Error Codes
Refer to Service Manuals posted on www.lg-dfs.com to troubleshoot individual error codes.
1
DEFINING COMMON ERROR CODES
LED1
LED2
Art Cool™ Mirror High-Efciency Single Zone Systems
LA090HSV System (LAN090HSV Indoor Units / LAU090HSV Outdoor Units)
LA120HSV System (LAN120HSV Indoor Units / LAU120HSV Outdoor Units)
LAU090HSV and LAU120HSV Outdoor Units
Location of PCB LEDs: To access outdoor unit PCB LEDs, remove top cover,
and then remove lid to PCB box.
Error
Code
21
22 Current transformer2 (CT2) error; alternating current (AC) input is too high. 2X 2X
23 DC link voltage is too low. 2X 3X
25 Voltage to the system is too low or too high. 2X 5X
26 Inverter compressor has seized up or is not providing rotation. 2X 6X
27
28 Inverter compressor DC voltage is too high. 2X 8X
Dening Common Error Codes
29 Inverter compressor amperage is too high. 2X 9X
31 Current to the current transformer (CT) thermistor is too low. 3X 1X
32 Inverter compressor discharge pipe temperature is too high. 3X 2X
40 Current transformer (CT) thermistor is disconnected or is shorted out. 4X —
41 Inverter compressor discharge pipe thermistor is disconnected or is shorted out. 4X 1X
44 Outdoor unit inlet air thermistor is disconnected or is shorted out. 4X 4X
45 Middle thermistor of outdoor unit condenser coil is disconnected or is shorted out. 4X 5X
46 Outdoor unit suction line thermistor is disconnected or is shorted out. 4X 6X
48 Outdoor unit coil outlet (liquid line) thermistor is disconnected or is shorted out. 4X 8X
53 Communication failure from outdoor unit to indoor unit. 5X 3X
60 Outdoor unit printed circuit board (PCB) EEPROM check sum error. 6X —
61 Outdoor unit condenser coil temperature is too high. 6X 1X
62 Outdoor unit inverter compressor PCB heat sink temperature is too high. 6X 2X
63 Condenser coil pipe thermistor temperature is too low. 6X 3X
65 Heat sink thermistor has disconnected or has shorted out. 6X 5X
67 Outdoor brushless direct current (BLDC) fan motor lock error. 6X 7X
Direct current (DC) peak error / internal power module (IPM) fault;
compressor DC voltage was too high.
Prospective short circuit (PSC) fault error; current to inverter compressor
between AC and DC converter circuit is too high.
Description
No. of Times Outdoor Unit PCB LEDs Blink
LED1 (Red) LED2 (Green)
2X 1X
2X 7X
Refer to Service Manuals posted on www.lg-dfs.com to troubleshoot individual error codes.
For continual product development, LG reserves the right to change specifications without notice.
LG Electronics U.S.A., Inc., Englewood Cliffs, NJ. All rights reserved. “LG Life’s Good” is a registered trademark of LG Corp.
2
LG Electronics U.S.A. – Commercial Air Conditioning
DFS-TP-AG-001-US 012H29
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