5
OPERATOR IS DEAD
When power is supplied to
the control board, no LED
turns ON.
OPERATOR DOES NOT RUN
Unit does not respond to a
Radio command.
OPERATOR DOES NOT RUN
Unit does not respond to
SBC command.
MOTOR DOES NOT RUN
Relays ‘click’ when Radio
or SBC signal is given, but
the operator does not
move.
GATE STOPS AND
REVERSES RIGHT AFTER
IT STARTS MOVING
GATE STOPS RUNNING
RIGHT AFTER IT STARTS
MOVING (BATTERY RUN)
GATE OPENS BUT DOES
NOT CLOSE
1) Battery fuse is blown.
➤
Replace battery fuse. Use only 20A, ATC style fuse.
2) Battery or Run Transformer
➤
Check battery and transformer connections.
connection is loose.
3) Dead battery.
➤
Measure voltage across battery > 23V.
4) Bad control board.
➤
Replace control board.
1) Low battery.
➤
Measure voltage across battery > 23V.
2) Radio (remote) not programmed.
➤
See Programming Remote section for programming instructions.
3) STOP button connection loose.
➤
Check STOP button connections (STOP and COM) to make sure they
STOP LED is OFF.
are secure.
4) There is an obstruction blocking
➤
Check gate area to ensure photoelectric eyes are not blocked.
photoelectric eyes in direction
of movement.
5) Safety edge is damaged or on an
➤
Check gate area to ensure safety edge is not resting on an obstruction.
obstruction.
Check safety edge wiring and connections.
6) Interrupt loop is obstructed.
➤
Check gate area to ensure path is unobstructed.
7) Bad control board.
➤
Replace control board.
8) Motor fuse is blown.
➤
Replace motor fuse. Use only 15A, ATC style fuse.
1) Low battery.
➤
Measure voltage across battery >23V.
2) SBC button connection loose.
➤
Check SBC and COM connections to ensure they are secure.
3) STOP button connection loose.
➤
Check STOP button connections (STOP and COM) to make sure they
STOP LED is OFF.
are secure.
4) Obstruction is blocking the photoelectric
➤
Check gate area to ensure photoelectric eyes are not blocked.
eyes in the direction of movement.
5) The safety edge is damaged
➤
Check gate area to ensure safety edge is not resting on an obstruction.
or on an obstruction.
➤
Check safety edge wiring and connections.
6) Interrupt loop is obstructed.
➤
Check gate area to ensure path is unobstructed.
7) Bad control board.
➤
Replace control board.
8) Motor fuse is blown.
➤
Replace motor fuse. Use only 15A, ATC style fuse.
1) Bad motor.
➤
Replace motor.
2) Cable wiring between control and
➤
Replace control board.
operator arm disconnected or loose.
3) Bad control board.
➤
Replace control board.
4) Batteries not connected.
➤
Connect batteries.
1) A fault has occurred.
➤
Check gate for obstructions.
2) Force set too low.
➤
Adjust FORCE setting until gate completes a full open/close cycle
without reversing. The force setting may need to be adjusted in cold
weather, as the gate will not move as freely.
1) Battery voltage low or near low
➤
Charge batteries. If problem persists, they may be near the end of their
voltage cut-off.
life. Replace batteries.
NOTE:
Replace both batteries at the same time.
Use only Chamberlain part #K74-30762 for replacement batteries.
2) A fault has occurred.
➤
Check gate for obstructions.
1) An input is continuously activated.
➤
Verify that all inputs are functioning properly.
2) Entry system output is connected to
➤
Verify Entry system connections and operation.
the Open input, and is “stuck” opening.
FAULT
POSSIBLE CAUSE
FIX
T R O U B L E S H O O T I N G
