LiftMaster SL400EVK & 722e Failsafe

[Prem]

Hey @Prem,

I tried your suggestion but have been stuck on a E1 error.  I am fairly sure that the photocells are aligned and they have just been wired too so think there should be no cuts - could it be that they are faulty ?  The manual mentions LED's but can't see any on either device so are scratching my head - any other ideas ?

Many thanks again.

Hi Tucks,

An E1 error usually means a faulty photocell I'd say this because your photocells should have a constant LED on both.

I've attached a photo of the issues you may have with E1:

Thanks Prem