Received-SPF: pass
 receiver=logan.com; client-ip=64.12.143.80; envelope-from=Sky2high@aol.com
From: Sky2high@aol.com
Full-name: Sky2high
Message-ID: <68ac7.406b22d9.3f7a51f3@aol.com>
Date: Mon, 30 Sep 2013 00:02:59 -0400 (EDT)
Subject: Re: [LML] Re: leaky electrical system
To: lml@lancaironline.net
MIME-Version: 1.0
Content-Type: multipart/alternative; boundary="part1_68ac7.406b22d9.3f7a51f3_boundary"

--part1_68ac7.406b22d9.3f7a51f3_boundary
Content-Type: text/plain; charset="US-ASCII"
Content-Transfer-Encoding: 7bit

Terrence,
 
If you have normal wiring, the Master relay should control all power  - all 
power connected after the contactor is closed.  One side of  the master 
relay coil is connected to  battery + and the Master switch  should ground the 
other side of the coil to operate the contactor.  The one  exception is 
special wiring for an electronic ignition that might have a direct  to battery 
power switch.
 
This means that you should have no battery drain with the master switch off 
 (and any master relay bypass switch for the electronic ignition).
 
Is it possible that the power tap for the pump is on the battery side  of 
the master relay?  If so, what else is powered by that CB?.
 
Interesting,
 
Scott
 
PS, the "pump running" light receives iots power from the contactor plate  
of the pump control relays (I terminal) only when power is being passed to  
the pump.
 
 
In a message dated 9/29/2013 10:15:43 P.M. Central Daylight Time,  
colyncase@earthlink.net writes:

Terrence,

I'm inferring that you saw an instantaneous  current.   ...indicating you 
see some current when the pump is not  running.  Could it be something in how 
you have your indicator (e.g. pump  running) lights wired?

On Sep 29, 2013, at 10:53 PM, Terrence O'Neill  wrote:

My N211AL is from kit no. 11, and has electric prop, electronic  ignition, 
dual grant rapids Tech EFIS, autopilot, flaps, navcom, GPS,  transponder, 
intercom, and retract gear.

My battery kept going dead, so  was advised to put an ammeter on it and see 
how much it was leaking, and then  start pulling circuit breakers.
It was leaking 18.7 milliamps.  I  pulled CBs one at a time and reset them. 
 Would you believe the very last  one stopped the leaking, and the ammeter 
went to 0.0.
It is the CB for the  hydraulic pump.

Question:  why is that circuit leaking when the CB  is in?
The pump works fine.  
I have added a pressure switch to  keep the gear down and the airspeed is 
below about 85 mph ... or to put the  gear down when the airspeed drops below 
85k. The pump is off when the Master  is off.
Is there something in the pump circuit that allows it to  bleed?

(For now I'm adding to the Check List for Shutdown:  Hyd.  Gear CB  -- out.)

Any suggestions  welcomed.

Terrence
N211AL L235/320
About 200 hrs.
--
For  archives and unsub  
http://mail.lancaironline.net:81/lists/lml/List.html


--
For  archives and unsub  
http://mail.lancaironline.net:81/lists/lml/List.html

--part1_68ac7.406b22d9.3f7a51f3_boundary
Content-Type: text/html; charset="US-ASCII"
Content-Transfer-Encoding: quoted-printable

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN">
<HTML><HEAD>
<META content=3D"text/html; charset=3DUS-ASCII" http-equiv=3DContent-Type>
<META name=3DGENERATOR content=3D"MSHTML 10.00.9200.16686"></HEAD>
<BODY id=3Drole_body style=3D"FONT-SIZE: 10pt; FONT-FAMILY: Arial; COLOR: #=
000000"=20
bottomMargin=3D7 leftMargin=3D7 rightMargin=3D7 topMargin=3D7><FONT id=3Dro=
le_document=20
color=3D#000000 size=3D2 face=3DArial>
<DIV>Terrence,</DIV>
<DIV>&nbsp;</DIV>
<DIV>If you have normal wiring, the Master relay should control all power=
=20
-&nbsp;all power&nbsp;connected after the contactor is closed.&nbsp; One si=
de of=20
the master relay coil is connected to&nbsp; battery + and the Master switch=
=20
should ground the other side of the coil to operate the contactor.&nbsp; Th=
e one=20
exception is special wiring for an electronic ignition that might have a di=
rect=20
to battery power&nbsp;switch.</DIV>
<DIV>&nbsp;</DIV>
<DIV>This means that you should have no battery drain with the master switc=
h off=20
(and any master relay bypass switch&nbsp;for the electronic ignition).</DIV=
>
<DIV>&nbsp;</DIV>
<DIV>Is it possible that the power tap for the pump&nbsp;is on the battery =
side=20
of the master relay?&nbsp; If so, what else is powered&nbsp;by that CB?.</D=
IV>
<DIV>&nbsp;</DIV>
<DIV>Interesting,</DIV>
<DIV>&nbsp;</DIV>
<DIV>Scott</DIV>
<DIV>&nbsp;</DIV>
<DIV>PS, the "pump running" light receives iots power from the contactor pl=
ate=20
of the pump control relays (I terminal)&nbsp;only when power is being passe=
d to=20
the pump.</DIV>
<DIV>&nbsp;</DIV>
<DIV>
<DIV>In a message dated 9/29/2013 10:15:43 P.M. Central Daylight Time,=20
colyncase@earthlink.net writes:</DIV>
<BLOCKQUOTE=20
style=3D"PADDING-LEFT: 5px; MARGIN-LEFT: 5px; BORDER-LEFT: blue 2px solid">=
<FONT=20
  style=3D"BACKGROUND-COLOR: transparent" color=3D#000000 size=3D2=20
  face=3DArial>Terrence,<BR><BR>I'm inferring that you saw an instantaneous=
=20
  current.&nbsp;&nbsp; ...indicating you see some current when the pump is =
not=20
  running.&nbsp; Could it be something in how you have your indicator (e.g.=
 pump=20
  running) lights wired?<BR><BR>On Sep 29, 2013, at 10:53 PM, Terrence O'Ne=
ill=20
  wrote:<BR><BR>My N211AL is from kit no. 11, and has electric prop, electr=
onic=20
  ignition, dual grant rapids Tech EFIS, autopilot, flaps, navcom, GPS,=20
  transponder, intercom, and retract gear.<BR><BR>My battery kept going dea=
d, so=20
  was advised to put an ammeter on it and see how much it was leaking, and =
then=20
  start pulling circuit breakers.<BR>It was leaking 18.7 milliamps.&nbsp; I=
=20
  pulled CBs one at a time and reset them.&nbsp; Would you believe the very=
 last=20
  one stopped the leaking, and the ammeter went to 0.0.<BR>It is the CB for=
 the=20
  hydraulic pump.<BR><BR>Question:&nbsp; why is that circuit leaking when t=
he CB=20
  is in?<BR>The pump works fine.&nbsp; <BR>I have added a pressure switch t=
o=20
  keep the gear down and the airspeed is below about 85 mph ... or to put t=
he=20
  gear down when the airspeed drops below 85k. The pump is off when the Mas=
ter=20
  is off.<BR>Is there something in the pump circuit that allows it to=20
  bleed?<BR><BR>(For now I'm adding to the Check List for Shutdown:&nbsp; H=
yd.=20
  Gear CB&nbsp; -- out.)<BR><BR>Any suggestions=20
  welcomed.<BR><BR>Terrence<BR>N211AL L235/320<BR>About 200 hrs.<BR>--<BR>F=
or=20
  archives and unsub=20
  http://mail.lancaironline.net:81/lists/lml/List.html<BR><BR><BR>--<BR>For=
=20
  archives and unsub=20
http://mail.lancaironline.net:81/lists/lml/List.html</FONT></BLOCKQUOTE></D=
IV></FONT></BODY></HTML>
--part1_68ac7.406b22d9.3f7a51f3_boundary--