Chamberlain LA412PKGUL Instruction Manual page 42

SYMPTOM POSSIBLE CAUSES
Gate opens, but a. Open control active
will not close with
b. Vehicle loop detector active
transmitter or
c. Fire Dept input active
Timer-to-Close.
d. Timer-to-Close not set
e. Close Entrapment Protection Device active
Gate closes, but a. Vehicle loop detector active
will not open.
b. Low battery with LOW BATT option set to
CLOSE
Exit loop activation a. Exit vehicle detector setup incorrectly
does not cause
b. Defective Exit loop detector
gate to open.
c. Low battery with LOW BATT option set to
CLOSE
Interrupt loop does a. Vehicle detector setup incorrectly
not cause gate to
b. Defective vehicle loop detector
stop and reverse.
Shadow loop does a. Vehicle detector setup incorrectly
not keep gate at
b. Defective vehicle loop detector
open limit.
Obstruction in a. Force adjustment needed
gate's path does
not cause gate to
stop and reverse.
Photoelectric a. Incorrect photoelectric sensor wiring
sensor does not
b. Defective photoelectric sensor
stop or reverse
gate.
Edge Sensor does a. Incorrect edge sensor wiring
not stop or reverse
b. Defective edge sensor
gate.
Alarm sounds for 5 a. Double entrapment occurred (two
minutes or alarm obstructions within a single activation)
sounds with a
command.
Alarm beeps three a. Low battery
times with a
command.
On dual-gate a. Incorrect Bipart switch setting
system, incorrect
gate opens first or
closes first.
Alarm beeps when a. Expansion board setting
running.
b. Constant pressure to open or close is given
TROUBLESHOOTING
SOLUTIONS
a. Check all Open inputs for an active input
b. Check all vehicle detector inputs for an active detector
c. Check AC power and AC Fail option setting
d. Check if AC power is available. If no AC power, then running on
batteries and battery voltage must be 23.0 Vdc or higher. Charge
batteries by AC or solar power or replace batteries.
e. Check Fire Dept input
f. Check Timer-to-Close (TTC) setting
g. Check all Entrapment Protection Device inputs for an active sensor
a. Check all vehicle detector inputs for an active detector
b. Check if AC power is available. If no AC power, then running on
batteries and battery voltage must be 23.0 Vdc or higher. Charge
batteries by AC or solar power or replace batteries.
a. Review Exit loop detector settings. Adjust settings as needed.
b. Replace defective Exit loop detector.
c. Check if AC power is available. If no AC power, then running on
batteries and battery voltage must be 23.0 Vdc or higher. Charge
batteries by AC or solar power or replace batteries.
a. Review Interrupt loop detector settings. Adjust settings as needed.
b. Replace defective Interrupt loop detector.
a. Review Shadow loop detector settings. Adjust settings as needed.
b. Replace defective Shadow loop detector.
a. Refer to the Adjustment section to conduct the obstruction test and
perform the proper force adjustment that is needed.
a. Check photoelectric sensor wiring. Retest that obstructing photoelectric
sensor causes moving gate to stop, and may reverse direction.
b. Replace defective photoelectric sensor. Retest that obstructing
photoelectric sensor causes moving gate to stop, and may reverse
direction.
a. Check edge sensor wiring. Retest that activating edge sensor causes
moving gate to stop and reverse direction.
b. Replace defective edge sensor. Retest that activating edge sensor causes
moving gate to stop and reverse direction.
a. Check for cause of entrapment (obstruction) detection and correct. Press
the reset button to shut off alarm and reset the operator.
a. Check if AC power is available. If no AC power, then running on
batteries and battery voltage must be 23.0 Vdc or higher. Charge
batteries by AC or solar power or replace batteries
a. Change setting of both operator's Bipart switch settings. One operator
should have Bipart switch ON (operator that opens second) and the other
operator should have Bipart switch OFF (operator that opens first).
a. Pre-warning is set to "ON"
b. Constant pressure to open or closed is given
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