Model reference

LG LSC27990TT

Name: LG LSC27990TT
Brand: LG

Refrigerator

5 documents3 error codes8 service modes

Available documentation

Service Bulletin - Changed the water valve for sxs models with indoor heating icemaker3 pg
Covers this model

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01 on my LG LSC27990TT

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Test Mode 1 indication displayed during

From Service Manual 367594, p.46:

1.Access service mode to confirm the active fault code and read stored error history.

2.Measure control board supply voltage at test points. Expected: 12 VDC and 5 VDC.

3.Inspect all connectors on the main control for corrosion or backed-out pins.

Part EBR73304205

Main control board

CodeMeaning

Child Lock["Select Lock using the buttons","Press down the Lock button for 3 seconds to lock","When lock is…
Communication Data Check ModePress MENU and ICE PLUS button simultaneously for 6 seconds in the lock status.
Demo Mode["Set the Lock function first","Press the Temperature button and ◀ button simultaneously for 5…
Diagnostic (failure detection) function["The diagnostic function automatically detects failure when failure is found in product during the…
Icemaker Test ModePress and hold the Fill Key (water amount selection button on the icemaker) for more than 3 seconds.
LCD Check ModePress TEMPERATURE and ICE PLUS button simultaneously for 1 second in the lock status.
Test Mode 1 (Strong Cold / Manual Function)Press the test button on the main PCB once.
Test Mode 2 (Forced Defrost)Press the test button on the main PCB once while in Test Mode 1.

Full entry steps, exit procedures, and test sequences are available in Max.

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