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5.6 Fault finding flow charts
Reduced expan-
expansion vessel,
Mains supply off
!
If in doubt at any stage consult a qualified installer / electrician
16
Intermittent water discharge
sion volume
YES
Repressurize
see pt. 5.3
If problem stil persists contact a competent
No water flow from hot taps
NO
YES
Open supply
valve
If problem stil persists contact a competent
engineer/plumber
Line strainer
NO
blocked
YES
Clear line
strainer
engineer
Thermal control
failure
YES
Switch off power to
immersion heaters
and boiler supply to
the unit. When dis-
charge has stopped
check thermal con-
trols and replace as
necessary
Cold water PRV
incorrectly fitted
YES
Check and refit
as required
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