Controller Programming And Features - Chamberlain LiftMaster Professional SW420 Manual

C O N T R O L L E R P R O G R A M M I N G A N D F E A T U R E S
MOTOR LEARN FUNCTION (FORCE PROFILE)
This function is preprogrammed at factory. If either board or motor is replaced, the controller will
need to be programmed to "LEARN" the specific motor RPM profile of your operator. Switch "S3" is
provided for this. This is important for accurate force control. Failure to do so may result in improper
and unsafe operation.
To learn the motor:
NOTE: Motor Learn must be performed in stand alone mode.
1. Detach the unit from the gate, the motor needs to be learned without a load.
2. Press the motor learn button. The yellow LED should start to flash rapidly.
3. Install a jumper on either the hard open or the hard close input terminals. 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.
NOTE: It is important that the jumper is in constant contact while the gate is moving
in learn mode.
4. Reconnect the unit to the gate, reset the limits and adjust the force control.
FORCE CONTROL
Set the force control pot such that the unit will complete a full cycle of gate travel but can be
reversed off an obstruction without applying an unreasonable amount of force. On most operators
this will be around the middle of the range.
NOTE: For LED location refer to illustration on previous page.
DIAGNOSTICS (LEDS AND CODES)
There are three diagnostic LEDs. Two red LEDs (OL, CL) are indicators
for the open and close limits. The LEDs are illuminated when the limit
switch contacts are closed.
The third amber LED (DIA) is used to blink out diagnostic codes. The
number is the count of the number of times the LED is on in an 8
second period. The LED is on for approximately 1/2 second and
repeats every second until the number is reached. There will be a
pause following each pulse cycle (1-6 pulses) to differentiate between
the different diagnostic codes.
TROUBLESHOOTING LEDS
There are 9 troubleshooting LEDs (D11, D13, D15, D17, D19, D21,
D24, D29, D31).
RELAY DRIVE TROUBLESHOOTING LEDS
There are 5 troubleshooting LEDs (D2, D3, D4, D5, D6) on relay drives
K1 through K5. These LEDs will be illuminated when the microcontroller
relay drive is activated.
LED CODE
FLASHED
Normal operation.
OFF
1 Single entrapment sense.
2 Double entrapment sense.
3 Failed or no hall effect sensor.
4 Exceed maximum motor run time.
5
Loss of communications between master and
6
second during run mode.
ON
Motor not learned.
NO FLASH
* HARD INPUTS INCLUDE HARD OPEN, CLOSE AND STOP
INPUTS.
LED LED NAME
D11 RADIO
D13 SHADOW
D15 HARD CLOSE
D17 STOP
D19 SOFT OPEN
D21 HARD OPEN
D24 INT. LOOP
D29 OBS. OPEN On when edge is activated or when photo eye beam is broken.
D31 OBS. CLOSE On when edge is activated or when photo eye beam is broken.
LED LED NAME
D6 CONT A
D5 CONT B
D4 SAM
D3 LOCK
D2 ALARM
22
MOTOR LEARN BUTTON
Motor Learn
Button
FORCE CONTROL
Force
Adjustment
DIAGNOSTIC
CLEARED BY
MEANING
Control Input
Removal of problem.
Limit fault. Control Input*
Removal of problem.
Completion of motor
Learn Routine
DESCRIPTION
On when radio switch activated.
On when shadow loop is activated.
On when hard close switch is activated.
On when stop switch is not activated.
On when soft open switch is activated.
On when hard open switch is activated.
On when interrupt/safety loop activated.
DESCRIPTION
On when CONTACTOR A activated.
On when CONTACTOR B activated.
On when Sam Relay is activated.
On when Mag Lock Relay is activated.
On when Alarm Relay is activated.
Less
More
Sensitivity
N/A
Hard Input*
Hard Input*