A Linear Brand GDO (model LD033) does not close unless the wired button is held down.
I believe optical safety sensors:
- may have been exposed to flood water (hurricane Matthew flooding)
- LEDs are not lit up as per normal ops (all LEDs dark)
UPDATE: LEDS light up: the red LED on photo-detector is dark. Normally it is red when it detects the emitter source.
I suspect that the GDO thinks that the optical safety beam is interrupted \ broken and that is the reason why the RF opener can not close the door.
NORMAL GDO OPS: A separate, asymptomatic, instance of the same GDO setup was exposed to flood water but did not suffer this problem. Observations of normal ops include visible sensor LEDs being lit up to indicate power. Interruption of the beam results in one of the two LEDs going dark (red LED). The symptomatic GDO's unlit \ dark LEDs in the optical safety sensors indicate either the sensors are not receiving power or are damaged.
I would like to isolate (diagnose) the problem for corrective action: is there a good troubleshooting procedure? Any process or diagnostic questions are appreciated