LiftMaster LA412 LA412 Manual - Page 40

TROUBLESHOOTING » TROUBLESHOOTING CHART OPERATOR DOES NOT RESPOND TO REMOTE CONTROL COMMAND. GATE STOPS AND REVERSES IMMEDIATELY AFTER IT STARTS MOVING. GATE OPENS BUT DOES NOT CLOSE. • Antenna not connected. Verify the antenna and coaxial cable are properly connected to the control board. • Remote control not learned. Refer to Programming Remote Control section. • Bad control board. Replace control board. • Obstruction sensed. Check safety devices and gate for obstructions. • A fault has occurred. Check Diagnostic LED for possible error codes. • Force set too low. Adjust FORCE setting until gate completes a full open/close cycle without reversing. The force setting may need to be adjusted in cold weather, as the gate will not move freely. • Loops are reversed. Make sure that the Safety loop and Shadow loop are connected properly. The gate may trigger the Shadow loop as it moves, so it must be connected to the correct input. • Low or defective battery. At least one charged battery must be connected for the operator to operate. Verify battery fuse is intact. Check battery connections and battery voltage to be above 11.5 V. Replace batteries if necessary. • 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. • Low battery. Measure the voltage across the battery. Voltage should be above 11.5 Vdc. 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 photoelectric sensors, shadow loop, or safety loop. Check photoelectric sensor 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 AUTOMATICALLY WITH TIMER TO CLOSE ENABLED. • Verify that the Timer-to-Close is ON and adjusted to desired delay. • Gate opened by a force obstruction reversal. Check the Diagnostic LED and clear gate path of any obstructions. • The Interrupt loop or Shadow loop is obstructed (optional accessories). • Obstructed close photoelectric 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 11.5 Vdc. Replace battery if necessary. • 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 control or the SBC to close the gate and reopen it. Verify that the TIMER RUNNING LED is flashing. ALARM CONSTANTLY SOUNDS 5 MINUTES. SOUNDS WHENEVER A COMMAND IS ISSUED. • Double entrapment occurred. Two successive obstructions were encountered while moving the gate. Press the RESET button and ensure that the gate path is clear of all obstructions. Check the FORCE setting to make sure it is properly set. ALARM IS BEEPING 3 TIMES ON A COMMAND • Low battery. Measure the voltage across the battery. Voltage should be above 11.5 Vdc. Replace battery if required. GATE RUNS TOO SLOW GATE 2 CLOSES BEFORE GATE 1. ALARM BEEPS WHEN RUNNING. • 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. • 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. • Low battery. Measure the voltage across the battery. Voltage should be above 11.5 Vdc. Replace battery if required. 39