Installation manual

2. Set the transmitter DIP Switches

There are nine (9) transmitter DIP switches; each can be placed in three different

positions (+, 0, –). DO NOT set all the switches in the same position, such as all +,

all 0, or all –. Once the DIP switches have been set to a personal code, replace and

close the access cover.

WARNING: No other adjustments should be made inside the transmitter.

Setting Your Personal Transmitter Code

1. Remove the Transmitter Cover

Grasp the sides of the access cover and slide it away from the

transmitter button (see illustration). When the access cover is removed,

the battery and the DIP switches will be exposed. To set a new code,

use a small screwdriver to move the switches.

, Inc.

All GTO transmitters are set to a standard code at the factory and are ready to operate your Mighty Mule 250. For your

safety and security, however, we strongly recommend that you replace the factory setting with your own personal code.

Follow the directions below:

3. “Teach” the New Code to Control Board Memory

A. Unscrew and remove the electronic access cover on the bottom of the opener.

B. Press and hold transmitter button.

C. Press and hold the LEARN TRANSMITTER button on the control board

until the YELLOW LED light goes out.

D. Release transmitter button.

E. Release LEARN TRANSMITTER button. The new code is stored in control

board memory.

EDGE

RED

BLK

GREEN

SAFETY

CYCLE

RADIO

18 VAC

INPUT

LEARN

TRANSMITTER

SET

LIMIT

COMMON

YELLOW LED

15 AMP

Learn Transmitter Button