Solenoid Actuated Brake; Friction Clutch; Control Board Programming And Features - Chamberlain Liftmaster Professional SL595 Owner's Manual

SOLENOID ACTUATED BRAKE

The brake minimizes over-travel caused by gate coasting. An
added feature of the brake is to assist in preventing back driving
of the gate. The brake is spring-applied whenever the motor is not
running. Anytime the motor is running, the electric solenoid
physically releases the brake.
A solenoid brake is standard on SL585/595 operators. The brake
is adjusted at the factory and should not need additional
adjustment for the the life of the friction pad.
Replace friction pads when necessary. Refer to the illustration for
identification of components for the solenoid type brake system.

FRICTION CLUTCH

The friction clutch system is not an automatic reversing device. It
only serves to minimize damage to the gate operator and gate,
and to help minimize vehicle damage. If you need an external
automatic obstruction sensing device, items such as gate edges
and photo beams are available to help protect pedestrians
(page 4).
The clutch mechanism must be adjusted properly. During the
installation of the operator, you must tighten the clutch spring
lock nut so it is tight enough to operate the gate, yet loose
enough so that if the gate meets an obstruction, the clutch will
slip.
1. Loosen set screws of torque adjustment nut on the gear
reducer output shaft.
2. Back off torque nut until there is very little tension on the
Belleville washers.
3. Tighten torque nut gradually until there is just enough tension
to permit the operator to move the gate smoothly through a
complete open/close cycle, but to allow the clutch to slip if the
gate is obstructed.
4. Re-tighten the set screw that is directly over the flat portion of
the shaft.

CONTROL BOARD PROGRAMMING AND FEATURES

MOTOR LEARN FUNCTION (FORCE PROFILE)
This function is preprogrammed at factory. If either board or
motor is replaced, the control board will need to be
reprogrammed to "LEARN" the specific motor RPM profile of
your operator, the red button "S3" is provided for this. This is
important for accurate force control. Failure to do so may result
in improper and unsafe operation.
NOTE: Motor Learn must be performed in stand alone mode.
1. Ensure that the operator remains attached to the gate
throughout the entire process.
2. Press the motor learn button. The yellow LED should start to
flash rapidly.
3. Push and hold down either the open or the close buttons. The
motor will run for a few seconds and then stop. If the LED
goes out the motor is learned. If the unit activates a limit
before completing the learn or some other error occurs the
LED will go back to on continuously. If this happens try
learning while running in the opposite direction.
WARNING WARNING
To avoid SERIOUS PERSONAL INJURY or DEATH disconnect
electric power BEFORE performing ANY adjustments. CAUTION
AVERTISSEMENT
ATTENTION
ADVERTENCIA
PRECAUCIÓN
24
Solenoid
Release
Lever
Brake Plate
Friction
Assembly
Pads
Friction Clutch
Motor
Learn
Button (S3)