Commissioning, Liftmaster Sub300, CB11,Daitem D5731gb

[sundial]

Hello

Have just got my gates operating.

System I have is a 2 wing gate, Liftmaster sub300M, CB11 controller, combined with a Daitem D5731GB Wireless system. System is operating with Remotes and wireless system.

I have few questions:

After the gates are fully open or closed, the motors continue to hum for about 15 seconds. Is this a problem? if so what have I to do to rectify problem.

The gates closes or opens even when I block the photocell beams, I am assuming this is not correct. The photocells I have fitted are the 771E/770E and are wired as per page GB-6 that is to terminal 23 and 24. Do I need to link out 21,22, and 23?

Some times I need to leave the gates in an open position, can this be done automatically, if so how? I now turn off isolator!!!.

Is there any other commissioning points need to be carried out?

All comments and advice appreciated.

Regards
sundial