Chamberlain MotorLift HC280ML Manuel D'installation page 75

Gate opener does not function / does not respond
when button is pressed.
Immediately after the gate has started moving, it
stops and reverses.
The gate opener does not open the gate fully.
The gate opener hums slightly but has no force
The controller doesn't respond when I alter the
Dip-switches.
The gate opener only works when I press and
hold the button on the remote control.
"Timer to close" doesn't work.
The gate opener doesn't respond at all, although
the controller has been connected (LEDs are on).
The gate opener doesn't respond at all; no LED is
on.
The gate opener stops suddenly and then restarts
only after a lengthy pause.
The gate opener is so strong that it bends the
gate and/or post.
Can different A+B dimensions be used on the two
sides?
The gate must follow a slope.
The force setting has been altered, but no
difference is apparent.
The remote control's range is too short.
The gate post is so thick that I am unable to
comply with the requisite A+B dimensions.
1. Connection to button is loose.
2. STOP switch connection is loose; STOP
LED is off.
3. Obstacle is blocking photocell in direction
of movement.
4. Safety edge is damaged or has
encountered an obstacle.
5. Gate opener is still released.
Obstacle in area of gate.
1. Are the post dimensions A+B correct?
2. Has the running time of the controller been
set correctly?
3. Has the force been set correctly?
1. Capacitor is not correctly connected to the
brown and black cable.
2. Force has not been set.
3. The gate opener has been released.
1. Controller in 'hold to run' operating mode.
2. A safety facility is not working correctly
(photocell, safety edge).
1. Remote control has not been programmed.
2. LEDs indicate a fault.
3. Photocell connected incorrectly.
4. Jumper between STOP and COM missing.
5. Motor terminal possibly not connected
properly.
Possibly power failure.
If the gate is operated constantly, the motor
will reach its cut-off temperature - protective
facility - as the gate opener is not designed
for permanent operation.
1. A+B dimensions correct?
2. Force set too high?
3. Reinforce gate?
Generally speaking, yes, but the wings then open at different speeds. If the A+B dimensions
are altered significantly from the standard setting, the gate will run poorly and the fittings will
be subjected to greater stress (considerably reduced service life of installation).
Not recommended! Change gate! The gate can move in an uncontrolled (dangerous) manner if
the gate opener has been released. A stronger force is needed in the upwards direction of the
slope and then, in the opposite direction, the gate opener's force is too strong.
Disconnect the controller from the power supply for a few seconds in order to activate the
control board's self-diagnosis functionality.
The installation of an external aerial is recommended as the controller with the short cable
aerial is located either behind the post or near ground level in most cases. The optimum
location of the aerial is as high as possible in all cases. An appropriate aerial with installation
kit can be obtained from Chamberlain as an accessory with the product ref. no. ANT4X-1EML.
1. Check button and COM connections.
2. Check STOP switch connections
(STOP and COM).
3. Remove obstacle.
4. Remove obstacle and check
connections and wiring.
5. Lock gate opener.
Check area of gate for objects
1. Check A+B dimensions.
2. Reprogram as required – plus
approx. 3 seconds.
3. Correct force setting (gate opener
runs somewhat slower in windy
conditions).
1. Check wiring of capacitor.
2. Turn force potentiometer in a clockwise
direction.
3. Lock gate opener.
Disconnect controller from power
supply, then alter Dip-switches.
1. Disconnect controller from power supply,
then alter Dip-switches.
2. Observe LEDs; find and rectify fault.
1. Only works if the 2-cable photocell
770E(ML) or 771E(ML) has been
installed.
2. Then turn "timer to close"
potentiometer in a clockwise direction.
1. Programming remote control.
2. Find and rectify fault(s) (see description of
LEDs).
3. Check photocell connection / programming.
4. Connect simple jumper.
5. Check terminals and connections.
1. Check conductor and zero conductor.
2. Check house fusing.
Allow motor sufficient time to cool (min. 15
minutes).
1. Check A+B dimensions.
2. Turn force potentiometer in an
anticlockwise direction.
3. Possibly screw gate opener to a
reinforcement plate (post).
Possibly fit reinforcement plate at point
of pull / push pressure (gate wing).
Use suitable screws and plugs
Reduce post thickness or shift gate location.