Troubleshooting Chart - Chamberlain LA400UL Installation Manual

Troubleshooting Chart

SYMPTOM POSSIBLE CAUSES
Operator does not a. No power to control board
run and diagnostic
b. Open fuse
display not on.
c. If on battery power only, low or dead
batteries
d. Defective control board
Control board a. Reset switch is stuck
powers up, but
b. Stop button active or jumper not in place
motor does not
for stop circuit
run.
c. If on battery power only, low or dead
batteries
d. Open or Close input active
e. Entrapment Protection Device active
f. Vehicle loop detector or probe active
g. Defective control board
Arm moves, but a. Arm does not extend or retract enough
cannot set correct during 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
open or fully close during travel
when setting
b. Arm is interfering with mounting bracket
limits.
c. Gate is too difficult to move
Operator does not a. Check Open and Close command input
respond to a wired LEDs
control/command
b. Stop button is active
(example: Open,
c. Reset button is stuck
Close, SBC, etc.)
d. If on battery power only, low or dead
batteries
e. Entrapment Protection Device active
f. Vehicle loop detector or vehicle probe
active
Operator does not a. Check XMITTER LED when wireless
respond to a control is active
wireless control or
b. Stop button is active
transmitter
c. Reset button is stuck
d. Poor radio reception
Gate stops during a. Control (Open, Close) becoming active
travel and reverses
b. Vehicle loop detector active
immediately.
c. Low battery voltage
TROUBLESHOOTING
SOLUTIONS
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. Check reset switch
b. Check Stop button is not "stuck on", or verify that the stop button is a
normally closed circuit, or put a jumper on the stop circuit.
c. Charges batteries by AC or solar power or replace batteries
d. Check all Open and Close inputs for a "stuck on" input
e. Check all Entrapment Protection Device inputs for a "stuck on" sensor
f. Check all vehicle detector inputs for a "stuck on" detector
g. 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. Check all Open and Close inputs for a "stuck on" input
b. Check Stop button is not "stuck on"
c. Check Reset button
d. Charges batteries by AC or solar power or replace batteries
e. Check all Entrapment Protection Device inputs for a "stuck on" sensor
f. Check all vehicle detector inputs for a "stuck on" detector
a. Activate wireless control and check XMITTER LED is on. Re-learn
wireless control/transmitter to control board. Replace wireless control as
needed.
b. Check Stop button is not "stuck on"
c. Check Reset button
d. 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.
a. Check all Open and Close inputs for an active input
b. Check all vehicle detector inputs for an active detector
c. Battery voltage must be 23.0 Vdc or higher. Charge batteries by AC or
solar power or replace batteries
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