immergas hercules condensing boiler fault26

pico24

hi i have a constant fault 26 on my immergas hercules condensing boiler
it means 'no water safety switch closed and pump not working'
it wil work when i power boiler completely off and on again but when it reaches set point/temp it knocks off as it should but then fault26 flashes and only way to start again is power off &on.
The way it should work is when i turn dial for hot water a relay sends a signal to a motor which opens a valve to the tank and a circulator pump comes on (this happens simultaneously) there are 2 pipes coming from inlet & outlet of pump to a plunger - so when pump turns on the pressure difference extends the plunger to a microswitch which i presume tells system its good to ignite.
As i have said everything works when powered off and on - pump & valve, but when temp is reached the plunger retracts and fault appears
i think its probably something on the pcb but would like to be sure
any ideas appreciated
thanks

Egass13

pico24 wrote: »

hi i have a constant fault 26 on my immergas hercules condensing boiler
it means 'no water safety switch closed and pump not working'
it wil work when i power boiler completely off and on again but when it reaches set point/temp it knocks off as it should but then fault26 flashes and only way to start again is power off &on.
The way it should work is when i turn dial for hot water a relay sends a signal to a motor which opens a valve to the tank and a circulator pump comes on (this happens simultaneously) there are 2 pipes coming from inlet & outlet of pump to a plunger - so when pump turns on the pressure difference extends the plunger to a microswitch which i presume tells system its good to ignite.
As i have said everything works when powered off and on - pump & valve, but when temp is reached the plunger retracts and fault appears
i think its probably something on the pcb but would like to be sure
any ideas appreciated
thanks

No advice can be given out here other than you need an rgi. If you post your area somebody might be able to recommend one for you. Alternatively call RVR, based in limerick if I remember correctly. They are the agents for immergas.

wilser

Egass13 wrote: »

No advice can be given out here other than you need an rgi. If you post your area somebody might be able to recommend one for you. Alternatively call RVR, based in limerick if I remember correctly. They are the agents for immergas.

Was just about to post about RVR but I thought they where in Kerry/Killarney territory

jimf

think there in kenmare

Egass13

Ah right, don't know why I thought limerick tbh!

Dtp1979

Egass13 wrote: »

Ah right, don't know why I thought limerick tbh!

Potato patato

pico24

thanks guys, i figured it out, microswitch is stuck closed, bloody thing is hardwired so will have to look at rvr for replacement or might cut wires and solder on another one