LiftMaster MGJ Medium-Duty Gear-Reduced Jackshaft Operator for Rolling Grilles and Shutters - Manual (Page 7)

Turn on power, LED will flash 7 times on power up. Test all
controls and safety devices to make sure they are working
properly. If the operator does not function properly, contact your
installing dealer.
IMPORTANT NOTES:
• Do not leave power to the operator on unless all safety and
entrapment protection devices have been tested and are working
properly.
• Be sure you have read and understand all safety instructions
included in this manual.
• Be sure the owner or person(s) responsible for operation of the
door have read and understand the safety instructions, know how
to electrically operate the door in a safe manner and how to
manually disconnect the door from the operator.
To avoid SERIOUS PERSONAL INJURY or DEATH from
electrocution, disconnect ALL electric power BEFORE performing
ANY maintenance.
ATTENTION
AVERTISSEMENT AVERTISSEMENT
AVERTISSEMENT
WARNING
CAUTION
WARNING
WARNING WARNING
PRECAUCIÓN ADVERTENCIA
ADVERTENCIA ADVERTENCIA
TEST 3-BUTTON CONTROL STATION
1. Press OPEN button. (The door should move in the open
direction.)
2. Press STOP button. (The door should stop.)
3. Press CLOSE button. (The door should move in the close
direction.)
4. Release CLOSE button. Door should stop if in C2 mode. (The
door should continue closing if in B2 mode.)
5. Press STOP button. (The door should stop.)
TEST LIMIT ADJUSTMENT
1. Press OPEN button. (The door should open.)
2. Allow the door to fully open.
3. Press CLOSE button. (The door should close.)
4. Allow the door to fully close.
5. If the limits are not set properly, contact your installing dealer.
TEST THE SAFETY DEVICES (IF INSTALLED)
1. Open the door.
2. Place an obstruction in the path of the photo eyes or sensing
edge.
3. Press the CLOSE button.
The door should not close if photo eyes are installed. The door
should close to obstruction and reverse if sensing edge is
installed.
4. Remove the obstruction.
5. Press CLOSE button. Door should close.
If door did not reverse from obstruction, check safety devices.
TEST REMOTE CONTROL
* Requires B2 wiring type and compatible LiftMaster remote
control. In C2 wiring the remote control will open the
door only.
1. Press remote control button.
2. Door should open. Allow the door to fully open.
3. Press remote control button.
4. Door should close. Allow door to fully close.
T E S T I N G
7