Autohelm ST7000 Autopilot Question

[Robin Davis]

Our ST7000 powers up, goes onto stanby and shows the correct heading. When auto is pressed you can hear the the solenoid in the CR interface unit click in and the constantly running hydraulic power pack starts running.
All OK so far!
However when you input a course change an alarm sounds and a message comes up on the display "NO MAIN POWER" and the unit returns to standby.
Using a multi meter I have checked that there is input power to the control unit (course computer) and the CR interface unit. Also there is power at the terminal blocks in the interface units for the supply and clutch. There appears to be no power on either of the solenoid valve outputs in the interface unit when you input a course change.
Any ideas on what I am missing or what is wrong?
Can I apply a voltage directly to the solenoid valves to see if they operate?
The input power is 24v but the voltage on the clutch terminals is 12v, are the solenoid valves likely to work on 12V?

[GordMay]

Greetings and welcome aboard the CF, Robin.

Yes, you can I apply a voltage directly to the solenoid valves to see if they operate.
I'd disconnect the wires from the controller, prior to jogging the solenoid(s).

[bazzer]

Tried the fuses in the corepack?

[goboatingnow]

Yep probably fuses. ( or the output transistors , which was a known problem on some corepacks)
Dave

[CaptainBW]

May be a novice question but what is a corepack in the ST7000 system?

[Beausoleil]

Originally Posted by CaptainBW

May be a novice question but what is a corepack in the ST7000 system?

I think the term corepack came sometime after the Autohelm purchase by Raytheon (which spun off Raymarine, which is now owned by FLIR). Corepack is Ray-speak for the course computer, which is a separate device from the ST7000 control unit (control head). The old Autohelm course computers were the 100 and 300. Then Raymarine came out with their core packs, the S1, S2, S3/S3G, and now the current ones are the X-series. And then there's the integrated wheel pilots and tiller pilots as well...

[bazzer]

Originally Posted by Beausoleil

I think the term corepack came sometime after the Autohelm purchase by Raytheon (which spun off Raymarine, which is now owned by FLIR). Corepack is Ray-speak for the course computer, which is a separate device from the ST7000 control unit (control head). The old Autohelm course computers were the 100 and 300. Then Raymarine came out with their core packs, the S1, S2, S3/S3G, and now the current ones are the X-series. And then there's the integrated wheel pilots and tiller pilots as well...

Remember that the "corepack" can be integrated with the Raymarine chartplotter and controlled from either the chartplotter or the control head, in my system I have a E80 plotter and a ST7002 controller, I think its one nice system...
Bazzer

[Keysrock]

My problem is very basic. How do I turn on a Raymarine ST 7000? I don’t see thet in the manual