Troubleshooting Guide - Chamberlain GH Installation Manual

TROUBLESHOOTING GUIDE

FAULT POSSIBLE CAUSE
THE OPERATOR WILL a) No power supply
NOT RESPOND TO ANY
COMMANDS
b) Operator control station is wired wrong
c) Interlock switch is activated
d) Dial still in programming, option,
or diagnostic mode
e) Motor is malfunctioning
f) Motor thermal overload tripped
g) Possible accessory malfunction
h) Off Board relay may need to be
replaced see wiring diagram
i) Possible logic board failure
a) Loose secondary wiring connections
POWER LED IS NOT ON
or a faulty control transformer
b) Hoist interlock switch
a) Control station not connected or wired
STOP BUTTON LED IS
correctly
NOT ON
b) Interlock switch
a) RPM sensor is not connected properly
THE DOOR WILL MOVE
or may need to be replaced
ABOUT A FOOT THEN
STOP. AFTER STOPPING,
ONLY CONSTANT
b) Clutch slipping
PRESSURE COMMANDS
WILL MOVE THE DOOR
THE DOOR WILL MOVE
The Maximum Run Timer is not set
MOST OF THE WAY
correctly
TOWARDS A LIMIT THEN
STOP. AN EXTRA OPEN OR
CLOSE COMMAND IS ABLE
TO GET DOOR TO
COMPLETE CYCLE
There may be a Mid Stop set
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 a) The photoelectric sensors, edge or
WILL ONLY CLOSE AFTER
other sensing device is obstructed
A FIVE SECOND DELAY or activated
WITH CONSTANT
PRESSURE ON THE CLOSE
b) The logic board thinks that the direct
BUTTON connect photoelectric sensors are
attached and blocked
FIX
Verify primary line voltage from power source. Green POWER LED
➤
must be on.
➤ 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 LED next to stop button must be on.
➤ Check Interlock(s). If more than one external interlock is present they
must be wired in series. Green LED next to stop button must be on.
➤ Set dial to desired wiring type.
Verify proper voltage getting to the motor (Check motor name plate).
➤
➤ Check to see if motor is hot. Allow motor to cool before attempting to
move door. Cycle operator in constant pressure one full cycle open and
close to reset fault.
➤ Disconnect all devices, reattach them one at a time testing for a failure
after each one is replaced.
➤ 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).
➤ Replace logic board.
➤ Repair or replace connections or control transformer.
Check interlock. Verify the manual release chain is not engaged.
➤
➤ 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.
➤ Adjust clutch and verify that door is not binding.
➤ Manually reprogram the Maximum Run Timer (page 35).
OR reset the factory defaults (page 35).
➤ 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.
To reset Open Mid Stop refer to page 33.
➤ If the on board LMEP LED is flashing, the photoelectric sensor are
misaligned or not connected. Remove any obstructions, check the
safety device wires for continuity and shorts.
➤ Unlearn the photoelectric sensors from the memory by resetting
factory defaults.
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Troubleshooting guide