Troubleshooting Guide - Chamberlain APT Owner's Manual

TROUBLESHOOTING GUIDE

FAULT
THE OPERATOR WILL
NOT RESPOND TO ANY
COMMANDS
POWER LED IS NOT ON
STOP BUTTON LED IS
NOT ON
THE DOOR WILL MOVE
ABOUT A FOOT THEN
STOP. AFTER STOPPING,
ONLY CONSTANT
PRESSURE COMMANDS
WILL MOVE THE DOOR
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 DOOR WILL OPEN
SOME BUT NOT
COMPLETELY. AN EXTRA
OPEN IS ABLE TO GET THE
DOOR TO OPEN
COMPLETELY
THE DOOR WILL OPEN BUT
WILL ONLY CLOSE AFTER
A FIVE SECOND DELAY
WITH CONSTANT
PRESSURE ON THE CLOSE
BUTTON
POSSIBLE CAUSE
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
a) Loose secondary wiring connections
or a faulty control transformer
b) Logic board failure
c) Interlock switch
a) Control station not connected or wired
correctly
b) Interlock switch
RPM sensor is not connected properly
or may need to be replaced
The Maximum Run Timer is not set
correctly
There may be a Mid Stop set
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
FIX
➤
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.
➤
Repair or replace connections or control transformer.
➤
Replace logic board.
➤
Check interlock(s).
➤
Check wiring to control station.
➤
Check interlock switch(es) for continuity.
➤
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.
➤
Manually reprogram the Maximum Run Timer (page 24).
OR reset the factory defaults (page 25).
➤
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.
➤
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.
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