Chamberlain LIFTMASTER PROFESSIONAL SW470 User Manual page 29

SYMPTOM
Master or Second
Failure to cycle power after setup.
operator is not
functioning
properly.
The communication wiring may be
damaged or improperly wired for dual
gate operation.
The master or second unit is not
programmed correctly.
Operator runs but
Entrapment (Force Pot) incorrectly set. This pot must be set so that the gate will run smoothly normally and
then stops and
reverses direction.
Gate is binding or not running
smoothly.
Observe red LEDs D29 and D31.
The Hall Effect Sensor is not aligned/
adjusted correctly.
The operator opens
Check the red input status LEDs,
immediately upon
D11-D31, for indication of an active or
power up and does
malfunctioning accessory.
not close.
Programming Check the save switch on switch S1-1. If the switch S1-1 is in the on position any subsequent programming
changes do not
effect the gate.
Open photo eye
Open obstruction input is programmed
reverses gate
incorrectly.
closed when
activated during
opening.
Gate does not
Close obstruction input is
activate the timer to
programmed incorrectly.
close after the close
photo eye is
broken.
Radio controls will Radio terminals R1-4 are factory
close gate from the configured for residential
open limit. (Open and Close) radio function.
T R O U B L E S H O O T I N G c o n t i n u e d
POSSIBLE CAUSES
The power to each unit must be cycled in order to initiate proper
master/second communication if the operators were previously in
stand-alone mode.
Make sure that the communication wire that is used is twisted pair
and not run in the same conduit with any power wiring. Failure to do
so will result in interference across the master/second communication
line.
Review program settings pages 26-27 and check both the master and
second for proper programming.
reverse when encountering an obstruction. See page 24.
Disconnect the gate from the operator and swing the gate open and
close by hand at normal operating speed. Make sure that the gate
swings smoothly and does not bind. If the gate is hard to move or
binds repair the gate.
Both LEDs will indicate the activation of entrapment protection devices
on terminals J1-9 & J1-10 on the control board. Remove the devices
and retest. If the operator now runs without fault, check those
accessories as well as their wiring.
Make sure that the sensor is adjusted so that it is within 20
thousandths of an inch or as close to the magnets located on the
gearbox pulley as possible without coming into contact with them or
the pulley.
Replace the sensor if it is adjusted correctly but continues to fail.
If any red LEDs are on, check the corresponding input. An installed
accessory may be wired incorrectly or malfunctioning. Remove the
accessory and test the operator.
changes will not affect the gate. To make programming changes,
switch S1-1 off, make desired changes, and then switch S1-1 on.
The open obstruction input has been programmed to function with
gate edges not photo eyes. Refer to page 27 and reprogram the
obstruction inputs for correct operation.
The close obstruction input has been programmed to function with
gate edges not photo eyes. Refer to page 27 and reprogram the
obstruction inputs to match the accessories that are installed on the
operator.
Configure terminals R1-4 for residential radio function by performing
the following modifications:
1. Locate and disconnect the end of the wire running to terminal
J1-1 from R4.
2. Connect the end of wire removed from J1-1 to J1-6. Refer to
page 34.
29
SOLUTION