25
CONDITION POSSIBLE CAUSE FIX
OPERATOR WILL NOT
RESPOND TO ANY
COMMANDS
A) No power
➤ Verify primary line voltage (120 Vac, 60 Hz) is present at terminals L1 & L2.
The LED will fl ash when power is present.
B) Stop circuit not complete
➤ Verify Stop Button input (terminals 3 & 5) is properly wired and stop button is
not stuck.
C) Stuck button on 3-button
control station
➤ Verify that all buttons are actuating freely and releasing properly.
D) Interlock input activated ➤ Verify jumper is located at terminals 3 & 4 if interlock is not present.
➤ Verify interlock is properly wired and not activated.
E) Motor overload tripped ➤ Overload is internal within motor. Allow to cool and retry.
F) Accessory failure
➤ Attempt to close by holding the CLOSE button for more than 5 seconds. If door
closes, check accessory for proper wiring, polarity, connections or damage.
➤ Verify photoelectric sensors are aligned or sensing edge is not activated.
G) Possible component failure ➤ Call Technical Support for assistance.
OPERATOR MAKES
NOISE BUT DOOR DOES
NOT MOVE
A) Clutch slipping ➤ Adjust clutch, see ADJUSTMENT section.
B) Brake not releasing (if present) ➤ Verify brake assembly operation and wiring.
C) Door operation problem ➤ Disconnect trolley and check door for proper operation.
OPERATOR MOVES IN
THE WRONG DIRECTION
OPEN and CLOSE button wiring
connection reversed
➤ Check 3-button control wiring.
DOOR DRIFTS AFTER
OPERATOR STOPS
A) Door not balanced properly ➤ Disconnect trolley assembly and check door for proper operation.
B) Clutch slipping ➤ Adjust clutch, see ADJUSTMENT section.
C) Brake not functioning properly
➤ Check brake mechanism to ensure brake lever is free and brake pads are
engaging the brake disc.
DOOR OPENS/CLOSES
TOO FAR
Limits not adjusted properly ➤ Adjust limits. See ADJUSTMENT section.
DOOR REVERSES
UNEXPECTEDLY
Intermittent Entrapment Protection
Device activation
➤ Check all connections.
TTC NOT FUNCTIONING
A) Monitored Entrapment
Protection Devices
➤ Check all connections. Verify photoelectric sensors are not blocked and the
sensing edge is not activated.
B) TTC temporarily disabled ➤ Close and Open the door. TTC will be re-enabled.
C) TTC not programmed properly ➤ Reprogram TTC. See PROGRAMMING TTC section.
RADIO FUNCTIONALITY NOTE: Built in radio receiver compatible with all LiftMaster 315 MHz remote control devices.
NO RESPONSE
A) Remote control is not
programmed
➤ See PROGRAMMING REMOTE CONTROLS section.
B) Remote control not compatible ➤ Obtain qualifi ed LiftMaster remote control device.
C) Low battery ➤ Replace battery.
REMOTE CANNOT BE
LEARNED
A) Low battery ➤ Replace battery.
B) Remote control not compatible ➤ Obtain qualifi
ed LiftMaster remote control device.
POOR RADIO RANGE
A) Low battery in remote ➤ Replace battery.
B) Antenna not confi gured ➤ See SETUP RADIO ANTENNA.
C) Ambient radio interference or
building structural issue
➤ Use EXTERNAL ANTENNA kit (see ACCESSORIES page).
Technical Support 1-800-528-2806
TROUBLESHOOTING
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