Technical data

Vaillant Vantage 120/150/200 35
Fault finding 11
Fig. 19
Deteriorating water pressure and flow
from hot water terminal fittings.
Check incoming main water pressure.
OK
Check line strainer
(in pressure limiting valve).
OK
Check pressure limiting valve.
OK
Check sytem for blockage.
OK
Symptoms still persisting?
YES
Check system as for discharge from
temperature or expansion relief valve.
Inform customer to have water service
checked by water undertaker.
Poor
Clean / replace strainer.
Dirty
Replace faulty valve.
Faulty
Replace / clear blocked components.
Blocked
Fault remedied.
NO
VIH_Fault_D
Fault D: