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 Post subject: Campagnolo EPS issue?
PostPosted: Fri Apr 15, 2016 4:26 am 
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Joined: Tue May 30, 2006 10:38 pm
Posts: 1279
Location: NorCal
I just got a v1 EPS group and built up the bike today. When setting it up the power unit would occasionally buzz 3 times and the green light would go on. When this happened I couldn't shift for a short period of time.

Can anyone tell me what is going on with that?

Thanks in advance!
Jeff


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PostPosted: Fri Apr 15, 2016 3:20 pm 
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Joined: Sun Jan 03, 2010 4:58 am
Posts: 670
The first EPS SR I purchased had a bad v1 power unit. I was told by my LBS that Campagnolo's first batch was not the best. I did receive a new one under warranty and it worked fine. I eventually updated to the v2 power unit.


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PostPosted: Fri Apr 15, 2016 5:50 pm 
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Posts: 17
Are you saying that you went through the entire Zero Setting procedure, and it was working fine in all gears, and then the issue was happening?
On the power unit, a green light means the rear derailleur.


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PostPosted: Fri Apr 15, 2016 5:55 pm 
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Joined: Thu Mar 03, 2016 8:37 pm
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http://eps.campagnolo.com/system/docume ... 012_UK.pdf

Have you read this yet?


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PostPosted: Fri Apr 15, 2016 9:28 pm 
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Posts: 2247
try turning off power and then redo the zero settings.


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PostPosted: Fri Apr 15, 2016 9:51 pm 
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Location: NorCal
I hadn't, but I just downloaded it. Thanks!

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PostPosted: Sat Apr 16, 2016 2:53 pm 
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Shop Owner / Manufacturer

Joined: Mon May 26, 2008 12:21 pm
Posts: 162
Location: UK
joeyb1000 wrote:
Are you saying that you went through the entire Zero Setting procedure, and it was working fine in all gears, and then the issue was happening?
On the power unit, a green light means the rear derailleur.


Strictly speaking the green LED on the PU has two functions.

On switch on, it should flash green briefly - this confirms sufficient charge in the battery to run at the very least, the diagnostics.

In diagnostics, the green LED lighting plus the buzzer may indicate a rear-derailleur *related* problem - it is not necessarily an indicator of a problem of the RD. It might be indicationg a poor (dirty, oxidised, water present) connection the the RD, it might be indicating a problem inside the RD (most often the position resolver not functioning correctly) or it might be indicating an error in the software that controls the RD, within the PU.

In the event of a "one off" occurrence of the green LED / buzzer, either mode button can be short-pressed - if the cause is amomentary "glitch" in the software, a short press of either mode button should restore normal function.

If a reperat occurrence - then careful check should be made of the cable from the PU to the connector, and from the connector to the RD for damage - this can occur from snagging inside the frame, abrasion at the entry / exit ports or by the BB axle, of from some other type of mechanical interference with the cable.

If a check on the cable shows no abnormality, check inside the plug connection for oxidisation, dirt, grease or water.

If both these checks prove negative, then return of the RD to a Service Centre via your retailer is the best course of action. The SC can evaluate the RD on a standard system and will repair or replace as required.

To correct / expand an earlier post, "early production was not the best" There was a specific issue with a percentage of early production v1 PUs in Record and Super Record - the very first production in late 2011, early 2012 was fine, there was then a short period where a production change was made which caused a problem (unfortunately this took a few months "in the wild" to manifest itself, testing had not revealed it as an issue) ... this change was reversed in early summer 2012 and subsequent production (including all Athena v1) was essentially problem-free.

There have been issues not related to manufacture but to storage of PUs that have started to manifest themselves recently - PUs, v1 particularly (these having been in storage longest) have not been regularly recharged in storage, leading to a well-known and understood problem that all Lithium Ion batteries can suffer from - under-volting. Users should be advised that under-volting is not a Campagnolo warranty issue - it is down to the distribution network and then to the final user, to ensure correct storage of PUs and Campagnolo do not warranty for this issue.

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PostPosted: Sat Apr 16, 2016 4:44 pm 
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Joined: Fri Jan 27, 2006 1:38 pm
Posts: 670
Location: Greater Pittsburgh
Unfortunately, I think it's a bad PU... The v1 had issues and I had exactly the same problem as you're experiencing...

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