I've had this opener for a number of years. Its the Phantom belt
drive model. Always worked like a charm. The other day, however, it
won't close. The opener is in the open position (door disengaged)
and when I press the wall button it starts, moves about 3 inches then
stops. If I press the wall button again, it moves another three
inches then reversed back to the start.

So - what should I check?

The first thing I did was clean the optical sensors near the door
bottom and aligned their beams. The are clear and pointing right at
each other. Of the two only one light, the green, is on.

Of course I'll now do some end to end electrical testing but I thought
I would post this Q to see if anyone has any "try this" ideas.

Thanks

On Sun, 29 Sep 2013 15:58:22 -0400, BobMCT
wrote:

I've had this opener for a number of years. Its the Phantom belt
drive model. Always worked like a charm. The other day, however, it
won't close. The opener is in the open position (door disengaged)
and when I press the wall button it starts, moves about 3 inches then
stops. If I press the wall button again, it moves another three
inches then reversed back to the start.

So - what should I check?

The first thing I did was clean the optical sensors near the door
bottom and aligned their beams. The are clear and pointing right at
each other. Of the two only one light, the green, is on.

Of course I'll now do some end to end electrical testing but I thought
I would post this Q to see if anyone has any "try this" ideas.

Thanks

My emergency pull rope will disengage the latch on the belt. Pull
once to disengage, another pull allows the latch to engage on the belt
on operation from the wall button. Without the second pull the belt
will not engage the belt.

"try this" - Let us know if yours works the same way.

On Sun, 29 Sep 2013 13:07:07 -0700, Oren wrote:

Yep, works the same way. That's how I've been able to utilize the
door while this problem exists.

It appears that I may have wiring issues with the side that was not
illuminated. I swapped sides and the "red" one now blinks two times.
According to the OD troubleshooting that means either the wiring to
the other side is bad -or- the sensor is defective. Seeing how when I
moved the non-working sensor to the other side and it comes on, I
guess its a wiring issue.

But, regarding replacing the sensor, can anyone advise as to what
other sensor(s) will work with this unit (Phantom 777)? The current
ones are "discontinued".

Thanks

On Sun, 29 Sep 2013 16:36:27 -0400, BobMCT
wrote:

But, regarding replacing the sensor, can anyone advise as to what
other sensor(s) will work with this unit (Phantom 777)? The current
ones are "discontinued".

Seek out "universal" sensors, try local stores?

I had a bad sensor on one GD. I had both replaced when a new GD was
installed. IIRC, it did not matter on the GD brand. YMMV.