Sd Brake; Troubleshooting; Diagnostic Chart - LiftMaster Logic 5.0 GSD Mode D'emploi

SD BRAKE

A drum brake comes standard on the SD model. It comes adjusted from the factory, however, occasional adjustments may be
necessary throughout the life of the brake.
ADJUSTING DRUM BRAKE:
1. Manually activate the brake by holding back brake lever and
insert a type of shim (a business card or a folded piece of
paper work well) between the brake pad and brake drum as far
away from the spring bolt as possible, while still inserting
between the brake pad and drum. Release the brake lever. This
will create the necessary space to ensure the brake is not
dragging when the door is in motion.
2. Tighten both stop bolts until the bolts come into contact with
the lever. Secure the stop bolts in place by tightening the stop
bolt nuts. Remove the shim used in step 1.
3. Tighten or loosen the spring bolt to add or release brake force.
4. Connect power to the operator. Run the operator and ensure
the brake is working properly.
5. Make any adjustment necessary. If the solenoid buzzes while
running, loosen the spring bolt until the buzzing is no longer
present when the operator is in motion. A buzzing solenoid will
stress the solenoid and can cause it to fail prematurely.

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 DIAG to keep the door from moving while troubleshooting.
LED COLOR
Power Green
Stop Green
Open Yellow
Close Yellow
LMEP Green
Timer Defeat Yellow
OLS Yellow
CLS Yellow
SLS Yellow
Edge Yellow
Mid Stop Yellow
Timer Enabled Green
SBC Yellow
MAS Yellow
Relay A Yellow
Relay B Yellow
DATA Green
** 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.
DEFINITION
Indicates that power is being generated for the logic board.
Indicates a closed circuit between common and terminal 5. Pressing stop should turn off this LED.
Indicates a closed circuit between common and terminal 7. Pressing the open button should turn ON this LED.
Indicates a closed circuit between common and terminal 6. Pressing the close button should turn ON this LED.
Solid on indicates LMEP learned. Flashing indicates sensors need to be re-connected or activated, or unlearned if
removed**. Solid off indicates no sensors learned.
Solid on indicates a closed circuit between common and terminal 12. Timer-To-Close will not close.
Pressing the Open Limit Switch should turn ON this LED. Indicates the Open Limit Switch is activated.
Pressing the Close Limit Switch should turn ON this LED. Indicates the Close Limit Switch is activated.
Pressing the Sensing Limit Switch should turn ON this LED. Indicates the Sensing Limit Switch is activated.
Indicates a closed circuit between common and terminal 8. Pressing the edge should turn ON this LED.
Solid on indicates door is stopped on up or down mid stop. Flashing indicates MID STOP is being set.
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. Each flash represents 1 second of
programmed time.
Indicates a closed circuit between common and terminal 1. Pressing the single button control station should turn
ON this LED.
Indicates the Maintenance Alert System has been activated or an error code has been triggered.
Indicates open or close command has been given to the motor. LED turns on when OPEN/CLOSE button is pressed.
Indicates open or close command has been given to the motor. LED turns on when OPEN/CLOSE button is pressed.
Indicates communication between the Logic 5.0 board and optional TLS1CARD.
Shims
Solenoid Cover
28
Brake Pad
Brake Drum
Brake Lever
Stop Bolts
Stop Bolts
Nuts
Spring Bolt
Troubleshooting