Greenstar 24Ri is constantly on

When I turn other two zone valves to manual, reset works and boiler works. If I leave it with BG UP1 controller and as auto, boiler does not ignite.
You are cofused to what happens when setting the valves to manual does, this merely opens the valve manually to allow the system to be filles, when a system is working properly the valve opens electrically and moves past the manual point and then activates a micro-switch, this in turn fires the boiler and pump, setting tha valve to Man will not bring the boiler on
 
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