Troubleshooting, Diagnostic chart, Led color definition – LiftMaster J door operator User Manual
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TROUBLESHOOTING
DIAGNOSTIC CHART
The logic board has several LEDs to assist in the installation and troubleshooting of the operator. The following chart should assist in
verifying the operator is functioning properly. Turn the selector dial to DIAGNOSTIC to keep the door from moving while
troubleshooting.
TROUBLESHOOTING
Power
Green
Indicates that power is being generated for the logic board.
Stop
Green
Indicates a closed circuit between common and terminal 5. Pressing stop should turn off this LED.
Open
Yellow
Indicates a closed circuit between common and terminal 7. Pressing the open button should turn
ON this LED.
Close
Yellow
Indicates a closed circuit between common and terminal 6. Pressing the close button should turn
ON this LED.
LMEP
Green
Solid on indicates photoelectric sensors learned. Flashing indicates photoelectric sensors need to be
connected or obstructed**. Solid off indicates no sensors learned.
Timer Defeat
Yellow
Solid on indicates a closed circuit between common and terminal 12. Timer-To-Close will not close.
OLS
Yellow
Pressing the Open Limit Switch should turn ON this LED.
CLS
Yellow
Pressing the Close Limit Switch should turn ON this LED.
SLS
Yellow
Pressing the Sensing Limit Switch should turn ON this LED.
Edge
Yellow
Indicates a closed circuit between common and terminal 8. Pressing the edge should turn ON this LED.
Mid Stop
Yellow
Solid on indicates door is stopped on up or down mid stop. Flashing indicates MID STOP is being set.
Timer Enabled
Green
Solid on indicates TIMER is programmed and will activate from open or mid stop position. Flashing
indicates Timer is counting down and door will close after preset time.
SBC
Yellow
Indicates a closed circuit between common and terminal 1. Pressing the single button control station
should turn ON this LED.
MAS
Yellow
Indicates the Maintenance Alert System has been activated or an error code has been triggered.
Relay A
Yellow
Indicates open or close command has been given to the motor. LED turns on when OPEN/CLOSE button is
pressed.
Relay B
Yellow
Indicates open or close command has been given to the motor. LED turns on when OPEN/CLOSE button is
pressed.
DATA
Green
Indicates communication between the Logic 4 board and optional TLSCARD.
LED
COLOR
DEFINITION
Troubleshooting
** RESTRICTED CLOSE. This method will allow you to close the door when LMEP device(s) are no longer working. Press and hold the
CLOSE button until the door reaches the closed limit. If the CLOSE button is released before the door reaches the closed limit the
operator will stop and the procedure will need to be repeated to fully close the door.