Lg Ls122he-ce, Ls093he-ce Owner's Manual

DEFINING COMMON ERROR CODES

Standard Wall-Mounted Non-Inverter Single Zone Systems LS093HE/CE Systems (LSN093HE/CE Indoor Units / LSU093HE/CE Outdoor Units) LS122HE/CE Systems (LSN122HE/CE Indoor Units / LSU122HE/CE Outdoor Units)

LSN093HE/CE and LSN122HE/CE Indoor Units

Location of light-emitting diode (LED) display

Error Code Description

1 Indoor unit thermistor is disconnected or is shorted out. 1X 2 Outdoor unit thermistor is disconnected or is shorted out. 2X 5 Communication failure from indoor unit to outdoor unit. 5X 9 Indoor unit electrically erasable programmable read-only memory (EEPROM) error. 9X

10 Indoor unit fan has locked up (fan motor operation failure). 10X

LSU093HE/CE and LSU122HE/CE Outdoor Units

LED

Defining Commom Error Codes

No. of Times Indoor Unit

LED Blinks

Location of PCB LED: To access, remove outdoor unit cover, and then remove lid to PCB box.

LED1 (Green)

Random blinking of LED1 (Green) indicates normal communication between the outdoor unit PCB and the indoor unit PCB.

DEFINING COMMON ERROR CODES

Test Mode Operation

LG non-inverter systems include a test mode that can be initiated by pressing the test key (button) on the outdoor unit PCB. Test mode can be used to verify individual component operation at any time. See table below for list of outdoor unit components tested. If system is functioning properly, the components will operate normally. If there are system errors, the components will not function.

Sequence of Test Steps

(Consecutive Button Pushes)

Outdoor Unit Component Tested Indoor Unit Operation

First Initializes test button mode. Units do not operate.

Second Compressor and condenser fan. Runs in Super High Fan Speed mode.

Third

Fourth

Reversing valve (verify using line voltage at connector terminal).

Red LED on PCB blinks.

Condenser fan, reversing valve, and crankcase heater.

Green LED on PCB blinks.

Fifth Fan (9,000 and 12,000 Btu/h capacity units only). Runs in Low Fan Speed mode.

Sixth

Fan (9,000 and 12,000 Btu/h capacity units only).

Red and green LEDs on PCB blink.

Seventh Resets for normal operation. Units will start after three (3) minutes.

Note:

•Resetting the power will terminate test button mode.

•Test button mode will self-terminate after 17 minutes of inactivity. System will then resume normal operation.

LED1 (Green) LED2 (Red)

Runs in High Fan Speed mode.

Run in Medium Fan Speed mode.

Runs in Super High Fan Speed mode.

Defining Commom Error Codes

Location of PCB LED and test key: To access, remove outdoor unit cover, and then remove lid to PCB box.

Test Key (Button)

Refer to Service Manuals posted on www.lg-dfs.com to troubleshoot individual error codes.

LG Electronics U.S.A. – Commercial Air Conditioning

For continual product development, LG reserves the right to change specifications without notice.

DFS-TP-AA-001-US 012J10