Diagnosis
Power or signal issue. The flashing wall panel indicates a loss of signal from the main opener unit or a power fault in the control circuit.
How to Fix It
First, check the opener unit's LED status light. It should be solid green. If it is off or flashing, check the unit's power cord at the outlet. Reset by unplugging the opener for 30 seconds, then replug. If the opener light is solid but wall panel flashes, disconnect the white button connector from the back of the wall panel for 10 seconds, then reconnect.
If That Didn't Work
Replace the 3V CR2032 battery in the wall control panel. A low battery can cause this symptom.
Heads Up
The wall panel uses a 3-wire, 22-gauge security cable. Pinched or damaged wires between the panel and opener will cause this. Inspect the wire run.