NAVPILOT 700/711 no "power on" and "auto-standby switch"

A

Anonymous

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Hi all,

we do have a NN3D installation including a NAVPILOT autopilot system. The installation was done in 2012 by a yard. Since than we are on a round-the-word trip. No problems with the NAVPILOT for years, but since a few weeks now, we do have the following problem:

1) condition "1"
NAVPILOT is on and the system is on AUTO. Than we like to go on STANDBY for hand steering and press the blue STANDBY buttom in the cockpit (NAVPILOT 711). Nothing happens - system still in AUTO mode. We run down in the deckshouse and press the STANDBY button on the NAVPILOT 700. Nothing happens. If we press the button several times, also for a long time, at some stage, AUTO went off and we are on STANDBY.

2) condition "2"
NAVPILOT is off and we like to turn it on. We press the blue "BRILL" button on the NAVPILOT 700 - but nothing happens. If we press it several times, also for a long time, the system starts at some stage and works fine.

So it seems that we do have a problem with the "blue" buttons as they do not switch on/off and/or switch between STANDBY and AUTO.

We checked with the self diagnostic function the buttons on both devices - no failure.
We checked the connections on both devices and on the FAP-7002. No sign of corrosion or bad connections.

Any idea/hint what we can do else?

Our configuration in detail:

PROCESSOR UNIT (FAP 7002)
ID: 56399
ROM:
6454007-01.14
6454009-01.05
CAN-ID: 54399

CONTROL UNIT (deckshouse NAVPILOT 700)
ROM:
6454011-01.07
6454010-01.02
Controller-ID: 3

CONTROL UNIT (cockpit NAVPILOT 711)
ROM:
6454011-01.05
6454010-01.02
Controller-ID: 5

Thank you in advance for any hint/suggestion/idea.

Peter.
 
While I am sure you pilot would benefit from a software update to the newest version; it is unlikely to change your current issue. It sounds like the control bus of the pilot has a problem. Most commonly it will stem from the bus not being properly terminated. Open buses can work (yes sometimes for years) and then come up to bite you later. I would start by checking the back of both your control indicators. There should be two cables or one cable and a terminator at the back of each unit. No open connections. No rubber protection caps. Two cables or one cable and a terminator.
 
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