No hot water since electricity meter change

Had electricity meter changed by eon a few days ago and since then no hot water unless immersion heater switched on manually. Have a Mynute combi boiler (checked today by engineer and working normally) and a Santon Premier p210e unvented hot water system. Meter was changed from Heatwise to Economy 10 and all other electrics in house working normally. Could the interruption in power have tripped something? Any other suggestions? Not sure whether to call out a plumber or electrician! Thanks in advance.

call a plumbing co. it probably needs a reset button pushed.


that is just a wild guess, do not know the product

Owners manual for your product, for your region, if it helps. Check page 14 for faults.
http://www.advancedwater.co.uk/STOMEMO/A540-088-2100/Santon Premier Plus Installation Guide.pdf