L5112D16B2 has no output!!

there is a L5112D16B2 unit!
when i DIM it from 100% to 59%,it works fine.

BUT,when i DIM it from 59%-0
there is a channel has no output!(voltage is 0)
and the other 11 channels works fine.


who can tell me why,please!
thanks

 

Mocher,

Check you MIN / MAX logic on the dimmer channel, this sets the channel to a virtual OFF / ON at a %dim.

HTH

Grant

 

thanks for your reply
.
I checked it,MIN/MAX sets 0/100,like the others.

 

You are very precise with the 100% to 59% figure how did you collect that information, by guessing the brightness of the light, by sending ramp to specific brightness commands or by checking the brighness on a touch screen display or C-bus monitor etc?

What is the 'curve' set to on the misbehaving channel? the same as other channels?

What is the load type and Wattage?

if you swop the connections to a load on an adjascent channel does the fault stay with the dimmer channel or with the load circuit?

My memory tells me that there is some form of two stage TRIAC control in this product, it may simply be that the TRIAC or it's control circuitry on the portion of the output that controls the lower portion of the dimming has failed

 

what need i do to solve this problem?

 

From your screen grab you are looking at a scene where if the scene is triggered all the channels on that dimmer would go to 50% except channel 10 which will go to 59%. If you want the scene to take channel 10 to 50% use the drop down box (arrow) next to the 59% and scroll down to 50% and select that number.

I'm not sure that this screen grab is reflecting the actual problem you have:

is the problem that this scene isnt working?

is the problem that channel 10 won't dim down to 0% (the fact that it says 59% on the scene tab may have nothing to do with the problem the scene may not even be active)

What is the total Wattage of load that you have on channel 10

 

Uncle Sam I need to get in touch with you

 

1100W

 

and ,there is another question,when i dim(m)ing one channel 's value of this unit in my SC5000CT,
the unit's C-Bus indicator will been Off,
then,i must disconnect DIM12 from CBUS network,then connect is again,
the C-Bus indicator will been On,

 

moocher

It sounds like you've got a couple of issues going on there. You would probably be best to contact Technical Support to work through them.

 

thanks,I just don't know who i can contact!

 

moocher

There are a number of support centres around the world. Their contact phone numbers are shown on the CIS website:
http://www2.clipsal.com/cis/technical/technical_support

The nearest one to you may be able to point you to someone more local if it is needed.

At a guess, the C-Bus indicator going out suggests that your network comms is marginal. The channel only working when set to 59% or more may be a hardware problem. Does it work at all percentages above 59% and not work at all percentages below 59%? If you're having network communication issues then the two problems may be related.

 

I think it is best to turn to where you buy the unit. There must be someone from Clipsal who sold it. Maybe they couldn't answer much, at least they can exchange one for you.

To me there are two issues..

First one, as said, should be hardware problem. As a simple observation, shut down the unit completely (no power in), open the cover and look at the 3 or 4 wires connecting to that particular channel. It could be a loose or damged cable inside. There are two circuits working for each channel and probably the second circuit has open citcuit...otherwise there is not much you can do.

Second one is likely c-bus power or wiring or burden issue. Make sure there is 30% more than enough c-bus power, no close loop wiring, has a burden....etc.

 

thanks for newman also!