LiftMaster LJ8950W LJ8950W Manual - Page 28

Troubleshooting Additional Troubleshooting The door operator doesn't operate from the single button control station: • Does the door operator have power? Plug a lamp into the outlet. If it doesn't light, check the fuse box or the circuit breaker. (Some outlets are controlled by a wall switch.) • Are the wiring connections correct? Review Installation Step 4. • Is there a build-up of ice or snow under the door? The door may be frozen to the ground. Remove any restriction. • The door spring may be broken. Have it replaced. The door operator operates from the single button control station, but not from a remote control: • Reprogram the remote control and replace the battery if necessary. Repeat with all remote controls. The door opens and closes by itself: • Be sure that all remote control push buttons are off. • Remove the bell wire from the single button control station terminals and operate from the remote only. If this solves the problem, the single button control station is faulty (replace), or there is an intermittent short in the wire. • Erase the memory and reprogram all remote controls. The door doesn't open completely: • Disable any door locks. • Is something obstructing the door? Is it out of balance, or are the springs broken? Remove the obstruction or repair the door. The door opens but won't close: • The safety reversing sensor must be connected and aligned correctly before the door operator will move in the down direction. If you are able to close the door using constant pressure, verify the safety reversing sensors are properly installed, aligned and free of any obstructions (see page 18). Repeat the safety reverse test after the adjustment is complete. The door reverses for no apparent reason: • Is something obstructing the door? Pull the emergency release handle. Operate the door manually. If it is unbalanced or binding, call a trained door systems technician. • Clear any ice or snow from the floor area where the door closes. Repeat safety reverse test after adjustments. The door operator strains to operate door: • The door may be out of balance or the springs may be broken. Close the door and use the emergency release handle to disconnect the door. Open and close the door manually. A properly balanced door will stay in any point of travel while being supported entirely by its springs. If it does not, disconnect the door operator and call a trained door systems technician. The door operator motor hums briefly, then won't work: • The door springs may be broken. See above. • If the problem occurs on the first operation of the door operator, door may be locked. Disable any door locks. The door operator won't operate due to power failure: • Disable any door locks. Use the emergency release handle to disconnect the door. The door can be opened and closed manually. When power is restored, pull manual release a second time. • When in Battery Backup mode, battery power will last for 30 hours or up to 20 cycles over a 24 hour period. Door loses limits: • Reprogram limits see Adjustment Step 1. The door operator moves when the door is in operation: • Minor movement for this operator is normal as long as it is not excessive. • Check all mounting hardware to the door operator and/ or operator mounting brackets. Verify the operator is mounted at a right angle to the door shaft, sprocket and chain are aligned. The door operator is beeping: • Indicates unattended closure. The operator has been activated by the myQ App or the Garage and Gate Monitor. • A solid orange LED with beep, sounding approximately every 2 seconds, indicates the door operator is operating on battery power. • A flashing orange LED with beep, sounding every 30 seconds, indicates the battery is low. • A solid red LED with beep, sounding every 30 seconds, indicates the 12V battery will no longer hold a charge and needs to be replaced. 28