Troubleshooting Chart - Chamberlain LA500 Installation Manual

TROUBLESHOOTING
FAULT POSSIBLE CAUSES
Operator does not a) No power to control board
run and diagnostic
b) Open fuse
LED not on.
c) If on battery power only, low or dead batteries
d) Defective control board
Control board a) Check DIAGNOSTIC LEDs
powers up, but
b) Reset button is stuck
motor does not run.
c) Stop button active
d) If on battery power only, low or dead batteries
e) Open or Close input active
f) Entrapment Protection Device active
g) Vehicle loop detector or probe active
h) Defective control board
Relay clicks with a) Arm jammed or not connected
command, but motor
b) Defective motor or motor wires
does not turn on.
c) Defective control board
Arm moves, but a) Arm does not extend or retract enough during
cannot set correct travel
limits.
b) Arm is interfering with mounting bracket
c) Gate is too difficult to move
Gate does not fully a) Arm does not extend or retract enough during
travel
open or fully close
when setting limits.
b) Arm is interfering with mounting bracket
c) Gate is too difficult to move
Operator does not a) Check DIAGNOSTIC LEDs
respond to a wired
b) Check Open and Close command input LEDs
control/command
c) Stop button is active
(example: Open,
d) Reset button is stuck
Close, SBC, etc.)
e) If on battery power only, low or dead batteries
f) Entrapment Protection Device active
g) Vehicle loop detector or vehicle probe active
h) Defective control board
Operator does not a) Check DIAGNOSTIC LEDs
respond to a
b) Check XMITTER LED when wireless control is
wireless control or
active
transmitter
c) Stop button is active
d) Reset button is stuck
e) Poor radio reception
f) Defective control board
CORRECTIONS
a) Check AC and battery power
b) Check fuses
c) Charge batteries by AC or solar power or replace batteries
d) Replace defective control board
a) Use Diagnostic code to identify issue
b) Check Reset button
c) Check Stop button is not "stuck on"
d) Charges batteries by AC or solar power or replace batteries
e) Check all Open and Close inputs for a "stuck on" input
f) Check all Entrapment Protection Device inputs for a "stuck on" sensor
g) Check all vehicle detector inputs for a "stuck on" detector
h) Replace defective control board
a) Disengage the arm and ensure arm moves freely
b) Inspect motor wires for open wire, shorted wires, damage, etc. Else, replace arm.
c) Replace defective control board.
a) Disengage the arm and ensure arm moves freely
b) Examine the hinge point where the arm mounts to the gate post. Make sure that the arm
housing does not hit or interfere with the gate post or mounting bracket. Correct as
necessary.
c) Disconnect arm from gate and move gate manually. Gate must move easily and freely
through its entire range, limit-to-limit. Repair gate as needed.
a) Disengage the arm and ensure arm moves freely
b) Examine the hinge point where the arm mounts to the gate post. Make sure that the arm
housing does not hit or interfere with the gate post or mounting bracket. Correct as
necessary.
c) Remove arm from gate and move gate manually. Gate must move easily and freely
through its entire range, limit-to-limit. Repair gate as needed.
a) Use Diagnostic code to identify issue
b) Check all Open and Close inputs for a "stuck on" input
c) Check Stop button is not "stuck on"
d) Check Reset button
e) Charges batteries by AC or solar power or replace batteries
f) Check all Entrapment Protection Device inputs for a "stuck on" sensor
g) Check all vehicle detector inputs for a "stuck on" detector
h) Replace defective control board
a) Use Diagnostic code to identify issue
b) Activate wireless control and check XMITTER LED is on. Re-learn wireless control/
transmitter to control board. Replace wireless control as needed.
c) Check Stop button is not "stuck on"
d) Check Reset button
e) Check if similar wired control operates correctly. Check if wireless controls works properly
when within a few feet of operator. Check operator's antenna and antenna wire. Check
other wireless controls or devices.
f) Replace defective control board
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TROUBLESHOOTING CHART