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Chamberlain merlin MT23O Installation And Operating Instructions Manual page 12

Sectional and tilt garage door opener

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@sernruo rHE FoRcE sENstrtvtry
The Protectof SystemrM must be used for all
installations where the closing force as
measured on the bottom of the door is over
a00N Uokgf|
The force, as measured on the closing edge of the door,
should not exceed 400N (40kgf). lf the closing force is
measured to more than 400N, The Protector SystemrM must
be installed (refer section 21). The force setting regulates
the amounl of power required to open and close the door.
This procedure requires the door to be engaged (see
section 14) and run through one full cycle of operation.
Step 1: Start with the door in the fully open position and the
green control panel cover should be removed (see fig 1
section 22). Press the red "learn " button twice on the con-
trol panel to enter into the force learn mode. The amber
LED marked open on the control panel will flash quickly.
Step 2: Press the green operate button on lhe control
panel. The door will travel to the DOWN limit. Press the
operate button again, the door will travel to the UP limit. The
amber LED marked oper on the control panel will stop
flashinq when the force has been learnt.
Press learn
button twace
oo.. ffi
LED wirr start frashing
\5/
Press OPERATE
button (door will close)
Press OPERATE
button to open the
ooor
LED will turn off
@ resr rHE sAFETy REvERSE sysrEM
Procedure: Place a 40mm obstacle (1) laid flat on the floor under the garage door. Operate the door in the down direc-
tion. The door must reverse on the obstacle. lf the door stops on the obstacle, it is not travelling far enough in the down
direction. Remove the lamp cover to locate the travel limit adjustment screws. lncrease the down limit by turning down
limit adjustment screw clockwise (1 turn = approximatly 250mm travel). Repeat test.
When the door reverses on the 40mm obstacle, remove the obstacle and run the opener through a complete travel
cycle. Door must not reverse in closed position. lf it does, adjust Limits and Force and repeat safety reverse test.
7
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Repeat test once a month and adjust as needed.
1 2

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