Chamberlain LA412 ユーザーズマニュアル

 

43 

Operation and Maintenance

Gate opens but does not  

• An open input is continuously activated. Check the open loop or vehicle probe to  

close. 

  make sure they are clear of objects. Verify connections and operation for these

  

devices.

 • 

 

Low battery. Measure the voltage across the battery. Voltage should be above 
11.5Vdc. Replace battery if required.

 • 

 

(Optional Accessory) Entry system output is connected to the OPEN input, and is 
“stuck” opening. Verify entry system connections and operations.

 • 

 

Obstruction blocking close photo eyes, shadow loop, or safety loop. Check eyes for 
alignment and verify all connections and operation for safety devices.

 • 

 

(Optional Accessory) Close safety edge is damaged or on an obstruction. Verify 
operation and connection of close edge.

Gate does not close 

•  Verify that the Timer to Close is ON and adjusted to desired delay.

automatically with Timer to 

• Gate opened by a force obstruction reversal. Check the Diagnostic LED and clear  

Close enabled. 

  gate path of any obstructions.

 • 

 

The Interrupt loop or Shadow loop is obstructed (optional accessories).

 • 

 

Obstructed close safety sensor or safety edge (optional accessory). Check 
connections and operations of safety devices.

 • 

 

Low battery. Measure the voltage across the battery. Voltage should be above 
11.5Vdc. Replace battery is required.

 • 

 

An open input is continuously activated. Check the open loop or vehicle probe to 
make sure they are clear of objects. Verify connections and operation for these 
devices.

 • 

 

(Optional Accessory) Entry system output is connected to the OPEN input, and is 
“stuck” opening. Verify entry system connections and operation.

 • 

 

Operator in “Party” mode after RESET button pressed while at the OPEN limit. Use 
a remote or the SBC to close the gate and reopen it. Verify that the 
TIMER RUNNING LED is flashing.

Alarm constantly sounds 

• Double entrapment occurred. Two successive obstructions were encountered while 

for 5 minutes. Sounds  

  moving the gate. Press the RESET button and ensure that the gate path is clear of  

whenever a command is 

  all obstructions. Check the FORCE setting to make sure it is properly set.

issued.
Alarm is beeping 3 times on 

• Low battery. Measure the voltage across the battery. Voltage should be above 

a command. 

  11.5Vdc. Replace battery if required.

Gate runs too slow. 

•   Open and Close Limits are set too close together. If the Open and Close Limits are 

set within the ramp down distance of each other, the gate will run at slow speed all 
the time.

 • 

 

The gate is starting within the ramp down distance from the Open or Close Limit. 
Gate will run slow to limits if motion is started within the ramp-down distance from 
the limit.

Gate 2 closes before Gate 1. 

•  Lock/Bipart Delay not set. Slide the Lock/Bipart Delay switch to ON. Verify that 

Gate 1 starts moving first on open and last on close.

 • 

 

Gate is excessively heavy or hinges are bad. Verify that the gate is within the 
ratings for this product. Disconnect the arms and verify that both gates swing easily. 
Lubricate or replace hinges as necessary.

 • 

 

Gate is unbalanced. Disconnect the arms and verify that both gates swing easily in 
both directions. If the gates are harder to move in one direction verses the other, 
the gate is not properly balanced and the hinges must be adjusted.

 • 

 

Bad motor connection. Check the motor wires and connections for possible loose or 
corroded terminals.

Alarm beeps when running. 

•  Low battery. Measure the voltage across the battery. Voltage should be above 

11.5Vdc. Replace battery if required.