The priming of the pump can be independent of the FIA2.
When a successful prime is achieved, the 806-162 pressure switch on the 806-201 manifold will short circuit to ground, stopping the pump from running. Please check this part of the circuit. The grey are is the key to your problem.
Have to adjusted the 806-162 switch at anytime? If the switch is set beyond 10 bar, the pump will never stop.
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Richard L
aquamist technical support
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