Adjustment - Chamberlain Merlin Professional MT230 Installation And Operating Instructions Manual

18
ADJUST THE TRAVEL LIMITS
Without a properly installed safety system,
persons (particularly small children) could be
SERIOUSLY INJURED or KILLED by a closing
garage door.
• Incorrect adjustment of garage door travel limits will
interfere with proper operation of safety reversal
system.
• If one control (force or travel limits) is adjusted, the
other control may also need adjustment.
• After ANY adjustments are made, the safety rever-
sal system MUST be tested. Door MUST reverse on
contact with 40mm high object on floor.
To prevent serious damage to vehicles, be
sure fully open door provides adequate clear-
ance
NOTE: Repeated operation of the opener in a short
period of time during setup may trigger the thermal-
cutout of the motor. In this case you will have to wait
for approximately five minutes for the motor to cool
sufficiently to continue the installation process. If the
unit has overheated you will hear the relays clicking
in response to the transmitter or pushbutton but the
motor will not operate. After cooling down, normal
operation will resume.
The limit adjustment screws are inside the lamp cover
and are marked as up limit and down limit. One full turn
of either screw results in approximately 150mm of trolley
travel.
• Plug the opener into an earthed three-pin 220-240V out-
let and switch on the power. The opener's courtesy lamp
may turn on, or may flash for five seconds.
• Remove the lamp cover by turning the catch on its under-
side. Remove the green control panel cover to expose
the setup controls. Observe the red and orange indicator
LEDs. The red LED will stay on continuously at the fully
closed position. The orange LED will stay on continuous-
ly at the fully open position. Identify the green operate
button. Ensure the door is engaged on the trolley.
• Press and release the green operate button to move the
door up or down. Press again to stop in the required fully
open or fully closed positions. Each time the operate but-
ton is pressed the door will stop or move in the opposite
direction.
• When the door is at the fully closed position turn the down-limit screw (located adjacent to the courtesy lamp) until the
red down-LED stays on continuously.
• When the door is at the fully open position, turn the up-limit screw (located adjacent to the courtesy lamp) until the
orange up-LED stays on continuously.
• If the door can not be moved sufficiently far enough then look at the red and orange LEDs. If one of these is on con-
tinuously then the door has stopped at a limit point. Adjust that limit to allow more travel. One turn of a limit adjustment
screw = approximately 250mm of door travel.
ADJUSTMENT SECTION
11