Ideal logic water leak

[RobTi]

This surely suggests blocked trap or condi pipe?

Trap held under tap and constant flow out of it, tried around 1/2 pint of water down the condensate and runs away, actually thought a blockage was the fault at the start causing the drips at the gasket

 

[Madrab]

The traps in the Ideal are syphon traps - i.e. they get to a certain level then release the trap contents, rather than a water seal trap whereby they run constantly.
Sounds like your trap isn't syphoning properly if the condensate is backing up in the sump. The way these can be tested is by taking off the sump cover, take the plastic flue manifold tube out (pull up and pull bottom forward, and pull down and out), screw the sump cover back on and then run a mug or 2 into the sump, the trap should fill to its top and then syphon out, if it backs up into the sump then the trap is at fault or the condensate pipe is restricted retarding the syphon effect of the trap and making it backup until there is enough weight of water to force it to syphon.

 

[RobTi]

Well just to update engineer came out and found the condensate was blocked where it was connected to sink waste, turned out the original installer had just heated something and poked holes in the sink waste, so you could pour water down the condensate but as it was around 2m away it just took the water, he blew down it and discovered it was blocked, so posting just in case someone is looking in the future