Setting The Force; Test Cable Tension Monitor; Test Power Door Lock - Chamberlain Grifco CG3800 Instruction Manual

ADJUSTMENT STEP 2

Setting the Force

The force setting button is located on the front panel.
The force setting measures the amount of force
required to open and close the door.
1. Locate the purple button on the unit (Figure 1).
2. Push the purple button twice to enter unit into Force
Adjustment Mode (Figure 2). The LED (Indicator Light)
will flash quickly.
3. Push the remote control or door control (Figure 3). The
door will travel to the DOWN (close) position. Push the
remote control or door control again, the door will travel
to the UP (open) position. Push the remote control or
door control a third time to send the door to the DOWN
(close) position.
The LED (Indicator Light) will stop flashing when the force
has been learned.
The unit has learned the forces required to open and close
your door.
The door must travel through a complete cycle, UP and
DOWN, in order for the force to be set properly. If the unit
cannot open and close your door fully, inspect your door to
insure that it is balanced properly and is not sticking or
binding. See page 4, "Preparing your door."
Without a properly installed safety reversal system,
persons (particularly children) could be SERIOUSLY
INJURED or KILLED by a closing the door.
• NEVER learn forces or limits when door is binding or
sticking. Repair door first
• Too much force on door will interfere with proper
operation of safety reversal system.
• After ANY adjustments are made, the safety reversal
system MUST be tested. Door MUST reverse on
contact with 40mm (1 1/2") high object (or 4x2 laid
flat) on floor.
Figure 1
Indicator
Black
Light
Button
Purple
Button
Figure 3
Figure 2
BLACK
Push Purple button
twice to enter
unit into Force
Adjustment Mode
PURPLE
or
ADJUSTMENT STEP 3

Test Cable Tension Monitor

If your cable tension monitor has been activated the unit
will click 9 times. See (Figure 1) page 19.
ADJUSTMENT STEP 4

Test Power Door Lock

TEST
• With the door fully closed, the power door lock bolt
should be protruding through the track.
• Operate the door in the open direction. The power door
lock should retract before the door begins to move.
• Operate the door in the down direction. When the door
reaches the fully closed position, the power door lock
should automatically activate to secure the door.
NOTE: If the power door lock does not function, the lock
can be manually released by sliding the manual release
handle to the open position.
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