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Maintenance:
NOTE: Some transmitters use two CR2016
or equivalent batteries while others use a
single MN21 or equivalent battery.
NOTE: Use only MN21 or
equivalent 12-volt batteries.
Monthly Maintenance:
1. With door fully closed, manually operate the door with the emergency disconnect in the manual door oper-
ated position. If the door feels unbalanced or binds, have a qualifi ed service person repair or make adjustments
to the door.
2. Perform the contact/obstruction tests. See Step 29 for the contact/obstruction test instructions. Inability to
activate a door using the transmitter or wall station may be caused by a weak or dead battery. Press and hold
the activation button on either the transmitter or the wall station. If the LED does not light, this is an indica-
tion that the battery is weak or dead. Replace the battery.
NOTE: Dispose of dead batteries properly.
Battery replacement:
Insert a coin in the coin slot of the transmitter or wall station and twist coin to access the dead battery. Replace
the battery, being careful to match the positive (+) symbols on the circuit boards with the battery.
COIN SLOT
COIN SLOT
LED
LED