Garmin AP Reactor 40: CCU lost communication with the ECU12

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Hardware:
- Garmin Reactor™ 40 Autopilot Universal-Corepack ECU 12 GHP

Since the initial Installation we have had huge Problems with the Garmin Reactor 40 Autopilot.
The autopilot cannot be calibrated. Dockside and Sea Trial Wizards
- Dockside Wizards -> okay
- Sea Trial Wizards:
-> 1.5 Circle okay, Compass Calibration 67%
-> Zig Zag fail! Error Message appears
As soon as Pressure is applied to the Hydraulic Pump, the Autopilot loses control.
Error Message appears.
<The autopilot CCU has lost the connection with the ECU. Autopilot is in standby mode>

The first ECU was replaced by support, then I had to order a new ECU/CCU set and the problem is the same
Everything has been changed, ECU+CCU+all cables! Connectors protect with Wetprotect.
The autopilot pump is connected to the drive output with 12mm2 (4m).
The NMEA2000 is all new!

But it's the same problems again:

As soon as you activate the automatic Settings, the familiar error Message appears. (Zig Zag)
<The autopilot CCU has lost the connection with the ECU. Autopilot is in standby mode>

Now we have the Standards again:
Gain: 40%
Counter Gain: 74%
Acceleration Limiter: 62&

What absolutely disappoints me is that the Garmin Autopilot is not self-teaching. (B&G, NKE, Furuno are all this)
Did anyone find the Error?

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- What software do you have on the Reactor 40?
**Version 7.00
- What Display do you have?
* GPSMAP 1223
- What kind of heading sensor do you have installed?
**MSC-10
- Is there a connection to the NMEA2000 bus?
* Garmin MSC-10, Garmin TD50, Mareton WSO100, Actisense N"Konnect Weatherdock, Raymarine NG Backbone,*Raymarine E7, i60
- Who installed the whole system?
* myself
- On what boat is the system installed?
* Suncoast 42,*https://weltumsegeln.ch/about/segelyacht/
- Hydraulic Pump:
**Octopus Hydraulic Gear Pump 3012 (Flow Rate 3l)*

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- What software do you have on the Reactor 40?
Version 7.00
- What Display do you have?
GPSMAP 1223
- What kind of heading sensor do you have installed?
MSC-10
- Is there a connection to the NMEA2000 bus?
Garmin MSC-10, Garmin TD50, Mareton WSO100, Actisense N"Konnect Weatherdock, Raymarine NG Backbone, Raymarine E7, i60
- Who installed the whole system?
myself
- On what boat is the system installed?
Suncoast 42, 17 Tonns
- Hydraulic Pump:
Octopus Hydraulic Gear Pump 3012 (Flow Rate 3l)

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Hydraulik Elektro Pumpe:
- Octopus Hydraulic Gear Pump 3012
- Pruduct Nr.: OCTAFG3012
- Maximum capacity: 656 cm3
- Nominal Pressure: 150 psi
- Flow rate: 3 l / min, min= 2.15
- Max. Current: 17A
- Max pressure: 55 bar

Sleipner Helm pump 72070 :
- Housing: black
- Max. Pressure: 50 bar
- Variable volume: 70 cm3
- Hard to Hard rudder: 8 turn

Schleipner Steuerzylinder SP250 (71220)
- Stroke: 200 mm
- Max. working pressure/ Max. Druck: 50 bar
- Torque/Drehmoment = 250 kg-m
- Displacement/Verdrängung = 565 cm3

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Yacht Details:
- Type of ship: Sailing yacht Ketch
- Type: Suncoast 42
- Manufacturer: Yachtbouw Noord Nederland
- Year of construction: 1974
- Hull length: 12.80m
- Width: 3.85m
- Draft: 1.65m
- Displacement: 17 tons

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All cables and CCU/ECU replaced and the problem remained.

Thanks to Garmin Support, I received a note about the distance between the ECU and the hydraulic pump.

My Hydraulic Pump is in the Engine Compartment, the ECU in the Deckhouse.
I took this seriously and invested two days of work to install the CCU and ECU in the engine compartment closed 1 m to the Pump.

20sm with sail and engine worked fine. (Reaction 0)
Unfortunately there was no flat sea, so the calibration will have to wait.

I don't understand the logic, other Suppliers have a 6mm2 Connection for the Drive Output and Garmin 2.5mm2 with 1 Metre and this causes Problems for many Yacht Owners.