Chamberlain door opener - Manual (Page 27)

27
TROUBLESHOOTING GUIDE
FAULT POSSIBLE CAUSE FIX
THE OPERATOR WILL
NOT RESPOND TO ANY
COMMANDS a) No power supply
b) Operator control station is wired wrong
c) Interlock switch is activated
d) Dial still in programming or diagnostic
mode
e) Motor is malfunctioning
f) Motor thermal overload tripped
g) Failsafe switch is activated requiring
photo eyes
h) Off Board relay may need to be
replaced see wiring diagram
i) Possible accessory malfunction
j) Possible logic board failure
➤ Verify primary line voltage from power source.
➤ Use the OPEN, CLOSE and STOP LEDs to help check correct wiring.
Verify that the board is accepting commands by using the onboard
station. Green light next to stop button must be on.
➤ Check Interlock(s). If more than one external interlock is present they
must be wired in series.
➤ Set dial to desired wiring type.
➤ Verify proper voltage getting to the motor (Check motor name plate).
➤ Check for obstructions and verify the door moves freely. Cycle
operator in constant pressure one full cycle open and close to reset
fault. Check to see if motor is hot. Allow motor to cool before
attempting to move door.
➤ Move switch to non-failsafe or connect a failsafe sensing device.
➤ When the OPEN or CLOSE button is pressed, Relay A or B LED should
turn on and the door should move in the corresponding direction. If
Relay A or B lights and the door does not move, off board relay may
need to be replaced (see wiring diagram Off Board Relays).
➤ Disconnect all devices, reattach them one at a time testing for a failure
after each one is replaced.
➤ Replace logic board.
POWER LED IS NOT ON a) Loose secondary wiring connections or
a faulty control transformer
b) Logic board failure
c) Interlock switch
➤ Repair or replace connections or control transformer.
➤ Replace logic board.
➤ Check interlock(s).
STOP BUTTON LED IS
NOT ON a) Control station not connected or wired
correctly
b) Interlock switch
➤ Check wiring to control station.
➤ Check interlock switch(es) for continuity.
THE DOOR WILL MOVE
ABOUT A FOOT THEN
STOP. AFTER STOPPING,
ONLY CONSTANT
PRESSURE COMMANDS
WILL MOVE THE DOOR RPM sensor is not connected properly or
may need to be replaced ➤ Check the RPM assembly for loose connections. Check that RPM
wheel is turning when operator is running. Check for foreign matter
blocking optical lens.
➤ Replace RPM sensor.
THE DOOR WILL MOVE
MOST OF THE WAY
TOWARDS A LIMIT THEN
STOP. AN EXTRA OPEN
OR CLOSE COMMAND IS
ABLE TO GET DOOR TO
COMPLETE CYCLE The Maximum Run Timer is not set
correctly ➤ Manually reprogram the Maximum Run Timer (page 23).
OR reset the factory defaults (page 24).
THE DOOR WILL OPEN
SOME BUT NOT
COMPLETELY. AN EXTRA
OPEN IS ABLE TO GET
THE DOOR TO OPEN
COMPLETELY There may be a Mid Stop set ➤ Check to see if the Mid Stop LED is on. Clear the Mid Stop by turning
the selector dial to program. Press and hold the MID STOP button for
5 seconds. Return dial to desired wiring type.
THE DOOR WILL OPEN
BUT WILL ONLY CLOSE
AFTER A FIVE SECOND
DELAY WITH CONSTANT
PRESSURE ON THE
CLOSE BUTTON a) The photo eyes, edge or other sensing
device is obstructed or activated
b) The logic board thinks that the direct
connect photo eyes are attached and
blocked
c) Failsafe switch set
➤ If the on board EYES LED is flashing, the photo eyes are misaligned or
not connected. Remove any obstructions, check the safety device
wires for continuity and shorts.
➤ Unlearn the photo eyes from the memory by resetting factory defaults.
➤ Slide switch to Non-Failsafe mode.