Troubleshooting Guide - LiftMaster Logic 5.0 GSD Mode D'emploi

TROUBLESHOOTING GUIDE

FAULT
A RELAY CLICK IS HEARD
WHEN GIVEN A COMMAND
SLIGHTLY BEFORE MOTOR
MOVEMENT. RELAY LED'S ON
BOARD FLASH IN UNISON
WITH THE CLICK.
THE OPERATOR WILL NOT
RESPOND TO ANY COMMANDS.
POWER LED IS NOT
ILLUMINATED.
STOP BUTTON LED IS NOT
ILLUMINATED.
THE DOOR WILL MOVE ABOUT
A FOOT AND STOPS. AFTER
STOPPING, ONLY CONSTANT
PRESSURE COMMANDS WILL
MOVE THE DOOR.
THE DOOR WILL MOVE MOST
OF THE WAY TOWARDS A
LIMIT AND STOP. AN
ADDITIONAL 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 (RESTRICTED
CLOSE MODE).
Troubleshooting
POSSIBLE CAUSE
This is normal operation.
a) No power supply.
b) Control station not connected
or wired correctly
c) Interlock switch is activated.
d) Dial still in PROG, OPTN,
or DIAG mode.
e) Motor is malfunctioning.
f) Motor thermal overload is
tripped.
g) Possible malfunction of an
accessory.
h) Power Board may need to
be replaced.
i) Possible logic board failure.
a) Loose secondary wiring
connections or a faulty control
transformer.
b) Hoist interlock switch engaged.
a) Control station not connected
or wired correctly.
b) Malfunctioning interlock switch.
a) RPM sensor is not connected
properly or is malfunctioning.
b) Clutch is slipping.
The Maximum Run Timer is not
set correctly.
A Mid-Stop may be set.
a) The LMEP attached is
obstructed or activated.
b) The logic board thinks the
direct connect photoelectric
sensors are attached and
blocked.
FIX
No action necessary. See Logic Board Overview (page 18) for more information regarding
current sense.
➤ A) Make sure power is connected to the L1, L2 and L3 terminals.
B) Check the motor harness and ensure the motor harness is connected to the correct
power connector.
C) Check the transformer.
➤ Use the OPEN, CLOSE and STOP LEDs to help check for correct wiring.
Verify the board is accepting commands by using the onboard
station. The green LED next to stop button must be illuminated.
➤ 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 the desired wiring type.
➤ Verify proper voltage is being delivered 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 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 illuminate and the door should move in the corresponding
direction. If Relay A or B illuminates and the door does not move, the
Power Board may need to be replaced.
➤ 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. Make sure the interrupter cup is
turning when operator is running. Check for foreign matter blocking.
➤ Replace RPM sensor.
➤ Adjust clutch and verify the door is not binding.
➤ Manually reprogram the Maximum Run Timer (page 25) 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 LMEP LED is flashing, the photoelectric sensors are misaligned or not
connected. Remove any obstructions, check the entrapment protection device wires for
continuity and shorts. If more than one LMEP is installed with the use of a CPS3CARD
the LMEP will not flash when one of the LMEP's is blocked.
➤ Unlearn the photoelectric sensors from the memory by resetting factory defaults.
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