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bazzer 11-19-2006 02:52 PM

Digital timer problems
Hi all, i have 2 (maxi-jet 500) water pumps for the aquarium, both pumps work fine, however when i plug them into a digi screws up at random time.....the clock goes nuts/ the timer setting clear ect, i've tried 3 different timers from 3 diff manufactrurers, and all do exactly the same thing, and it doesn't even matter whether i have one pump or two running on the same timer (which are rated to 3000wts anyway)

Whats going on??
do i need surge protection things or something???

can anyone help please :( i've had 2 floods so far and don't know what to do


mdshunk 11-19-2006 03:19 PM

Can you post the manufacturer and models of the three timers that you've tried so far? It would be helpful, since we can try to see what they might have in common to be able to spot the failure mode.

bazzer 11-19-2006 06:36 PM

One is from Micromark, one is from Uni-com, the third was one i already had and don't know the manufcturer.

I presumed it must be the load, but if i plug a standard lamp in they work fine, as soon as i plug the pump or pumps into it, it happens, but i have found nothing about the pumps that exceeds 3000watts

Heres a link to the pumps.......Maxi-jet 500's (x2)

mdshunk 11-19-2006 07:29 PM

Ahh.... yes. Those pumps don't have enough load for solid state timers to work properly. If you read the instructions to a solid state digital timer, they do have a minimum required connected load for them to work properly. Add a light or something like that in addition to the pumps, and I'll bet they'll work like you expect.

bazzer 11-20-2006 05:44 AM

Wow, that sounds like sound advice, and an avenue i hadn't and wouldn't of thought of, i'll give it a go over the next 24 hours and see if it works.

Thanks for the help m8 :thumbup:

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