Test The Safety Reverse System - Chamberlain MT800 Installation And Operating Instructions Manual

Sectional and tilt garage door opener
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24

TEST THE SAFETY REVERSE SYSTEM

The safety reverse system test is important. The garage door must reverse on contact with a
40mm obstacle laid flat on the floor. Failure to properly adjust opener may result in serious
personal injury from a closing garage door.
Procedure: Place a 40mm obstacle (1) laid flat on the floor under the garage door. Operate the door in the down
direction. The door must reverse upon contact with the obstacle. If the door stops on the obstacle, remove
obstacle and repeat setting the limits and force sections 22 & 23 and repeat safety reverse 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. If it does, repeat setting the limits and force sections 22
and 23 and repeat safety reverse test.
40mm
Repeat test once a month and adjust as needed.
25
USING THE C98 MOTION DETECTING CONTROL PANEL (OPTIONAL ACCESSORY)
Press the push bar (1) to open or close the door. Press again to stop the door.
Light feature
Press the light button (2) to turn the opener light on or off, (it will not control the opener
lights when the door is in motion). If you turn it on and then activate the opener, the light
will remain on for 2-1/2 minutes. Press again to turn it off sooner. The 2-1/2 minute
interval can be changed to 1-1/2, 3-1/2 or 4-1/2 minutes as follows: Press and hold the
Lock button until the light flashes (about 10 seconds). A single flash indicates that the
timer is reset to 1-1/2 minutes. Repeat the procedure and the light will flash twice,
resetting the timer to 2-1/2 minutes. Repeat again for 3-1/2 minute interval, etc. (up to a
maximum of four flashes and 4-1/2 minutes).
Lock feature
Designed to prevent operation of the door from hand-held remote controls. However, the
door will open and close from the door control, the outside keyswitch and the keyless
devices as detailed in section 29.
To activate, press and hold the lock button (3) for 2 seconds. The push bar light will flash
as long as the lock feature is on.
To turn off, press and hold the lock button (3) for 2 seconds.The push bar light will stop
flashing.
The lock feature will also turn off whenever the "LEARN" button on
the opener panel is activated.
1
Locate minimum 1.5m above
the floor.
10
1
40mm
3
2
1

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Merlin mt800

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