Matronics Email Lists Forum Index Matronics Email Lists
Web Forum Interface to the Matronics Email Lists
 
 Get Email Distribution Too!Get Email Distribution Too!    FAQFAQ   SearchSearch   MemberlistMemberlist   UsergroupsUsergroups   RegisterRegister 
 ProfileProfile   Log in to check your private messagesLog in to check your private messages   Log inLog in 

Need help with some Z-14 electrical system troubleshooting

 
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List
View previous topic :: View next topic  
Author Message
Mauledriver(at)nc.rr.com
Guest





PostPosted: Tue Nov 27, 2018 11:05 am    Post subject: Need help with some Z-14 electrical system troubleshooting Reply with quote

(the Z-14 has 2 buses, 2 alternators and 2 batteries - B&C alternators
and regulators, Odyssey batteries)

I regularly fly with the 2 buses not interconnected.  At cruise I've
been seeing between 14.5 and 14.7 volts on both buses.  I've been
running like that for over a year.

On my last flight I noticed the voltage on bus 2 dropped almost 1 volt. 
It was jumping around between 13.4 and 14.0 volts.  I removed various
loads to see if perhaps I had a malfunctioning component but this had no
effect.

I engaged the cross feed to connect the 2 buses.  Bus 2 remained at 14
volts or less but was less jumpy staying closer to 14.  Bus 1 remained
at 14.5 to 14.7.

With the cross feed engaged and Bus 2 switched off, the voltage on Bus 2
dropped to between 12.4 and 13.7

With the cross feed engaged, I pulled the CB on the bus 2 regulator
taking the #2 regulator/alternator offline.  Bus 2 voltage was between
12.8 and 13.5 (bus 1 was 14.5)

I don't have a load tester but the bus 2 battery seems okay (12.78volts
with no load at 50F).  It would seem that I'm getting some current from
the alternator but there has been a distinct drop in bus 2 voltage.  I
would have thought that both buses would have roughly the same voltage
when interconnected with the bus 2 alternator offline.

I'm looking for some advice on troubleshooting.  Thanks!
---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus


- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
skywagon185(at)gmail.com
Guest





PostPosted: Wed Nov 28, 2018 10:28 am    Post subject: Need help with some Z-14 electrical system troubleshooting Reply with quote

A rough guess would be that the alternator possibly has lost one of its high current diodes.
On Tue, Nov 27, 2018 at 11:10 AM Bill Watson <Mauledriver(at)nc.rr.com (Mauledriver(at)nc.rr.com)> wrote:

Quote:
--> AeroElectric-List message posted by: Bill Watson <Mauledriver(at)nc.rr.com (Mauledriver(at)nc.rr.com)>

(the Z-14 has 2 buses, 2 alternators and 2 batteries - B&C alternators
and regulators, Odyssey batteries)

I regularly fly with the 2 buses not interconnected.  At cruise I've
been seeing between 14.5 and 14.7 volts on both buses.  I've been
running like that for over a year.

On my last flight I noticed the voltage on bus 2 dropped almost 1 volt. 
It was jumping around between 13.4 and 14.0 volts.  I removed various
loads to see if perhaps I had a malfunctioning component but this had no
effect.

I engaged the cross feed to connect the 2 buses.  Bus 2 remained at 14
volts or less but was less jumpy staying closer to 14.  Bus 1 remained
at 14.5 to 14.7.

With the cross feed engaged and Bus 2 switched off, the voltage on Bus 2
dropped to between 12.4 and 13.7

With the cross feed engaged, I pulled the CB on the bus 2 regulator
taking the #2 regulator/alternator offline.  Bus 2 voltage was between
12.8 and 13.5 (bus 1 was 14.5)

I don't have a load tester but the bus 2 battery seems okay (12.78volts
with no load at 50F).  It would seem that I'm getting some current from
the alternator but there has been a distinct drop in bus 2 voltage.  I
would have thought that both buses would have roughly the same voltage
when interconnected with the bus 2 alternator offline.

I'm looking for some advice on troubleshooting.  Thanks!


---
This email has been checked for viruses by Avast antivirus software.
https://www.avast.com/antivirus

===========
br> fts!)
r> > e.com" rel="noreferrer" target="_blank">www.mypilotstore.com
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
          -Matt Dralle, List Admin.
===========
-
Electric-List" rel="noreferrer" target="_blank">http://www.matronics.com/Navigator?AeroElectric-List
===========
FORUMS -
eferrer" target="_blank">http://forums.matronics.com
===========
WIKI -
errer" target="_blank">http://wiki.matronics.com
===========
b Site -
          -Matt Dralle, List Admin.
rel="noreferrer" target="_blank">http://www.matronics.com/contribution
===========





- The Matronics AeroElectric-List Email Forum -
 

Use the List Feature Navigator to browse the many List utilities available such as the Email Subscriptions page, Archive Search & Download, 7-Day Browse, Chat, FAQ, Photoshare, and much more:

http://www.matronics.com/Navigator?AeroElectric-List
Back to top
Display posts from previous:   
Post new topic   Reply to topic    Matronics Email Lists Forum Index -> AeroElectric-List All times are GMT - 8 Hours
Page 1 of 1

 
Jump to:  
You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You cannot attach files in this forum
You can download files in this forum


Powered by phpBB © 2001, 2005 phpBB Group