I just installed a new Royal.
The installation was fine. All checked.
Was making final adjustments to the setup when the following happened.
When Battery 1 was switched off via the switch the PB drove the L aileron servo to max deflect (ripping it from the housing) No control to any surface.
The only way to stop this was to unplug Battery 2
Upon trouble shooting the following was discovered.
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Plug in Battery 1, Power box comes on but no green light from the switch.
Battery 2 two system works fine.
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Plug in Battery 2 and switch on the unit then plug in battery one (which shows power without green light) then 'switch on battery 1' All is fine two green lights on the switch.
Now test the fail safe by disconnect battery 2 and the powerbox drives sometimes the elevator L to max or sometimes the aileron L to full and you don’t get redundant power you loose full control.
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You cannot switch off the powerbox with batt 1 connected and when you leave the system to battery 1 you have no control and but also one servo is driven to max
Any suggestions....?