Troubleshooting Guide - Mighty Mule FM402 Installation Manual

If your gate opener does not function properly, use this guide or use the online troubleshooter at
http://support.gtoinc.com before calling the GTO Service Department.
VISUAL AND AUDIBLE DIAGNOSTIC INDICATORS
1. VISUAL INDICATORS:
a. Power LED (Green):
• ON: AC power or Solar power is present.
• OFF: There is no input power.
b. Status LED (Yellow): (while unit is running this LED will be OFF)
• Rapid blinking in random pattern: GTO's transmitter 318 MHz signal is detected.
• Continuously ON: Battery is in fast charge mode.
• 1 Blink every 2 seconds: Battery is in float charge mode (battery is fully charged)
• OFF: Switch is in the OFF position or there is no input power for at least 60 seconds.
2. AUDIBLE INDICATORS (ALARM/BUZZER):
a. Beeps upon power up:
• This is normal self test when the unit is turned on.
b. Continuous beep after power up:
• Unit has learned new transmitter code, releasing the transmitter button will shut off
the alarm.
c. Rapid beeping:
• Unit has encountered two (2) obstructions without reaching either limit. (Power cycle to reset the alarm)
• Transmitter will not operate the gate.
• Alarm will automatically shut off after 5 minutes; gate will remain disabled until control box is restarted.
d. 1 beep every 20 seconds:
• Low battery is detected.
e. 1 beep every 2 second:
• Position sensor is open circuit. Call GTO Service department.
f. 2 beeps every 2 second:
• Position sensor is short circuit. Call GTO Service department.
g. 1 beep when attempting to activate the opener:
• Blown fuse.
• Battery is extremely low or damaged.
• Loose connection from battery to circuit board.
3. IF THE GATE STOPS AND REVERSES DIRECTION
1. Check the gate for binding or hinge damage.
2. Adjust stall force if necessary.
3. Reprogram closed position limits.
4. Check the position of the mounting brackets and readjust if necessary.
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Mighty Mule FM402 Installation Instructions

Troubleshooting Guide

rev 12-14-15