4.12 NO HW BUT CH ON
Does the display shows a "Tap symbol" when
a tap is on?
Are the flow rates correct as per Section 1.2.
Is the wiring between the PCB and the diverter
valve motor connected?
Check diverter head fully engaged and clip
secured onto waterset.
Is diverter stuck in the CH position?
Check and re-fit diverter valve actuator head.
Is Boiler DHW OK?
Change diverter valve motor
4.13 NO DISPLAY
Is there 230Vac to the boiler at L and N?
Is the wiring from the terminal block to the PCB
Replace the PCB?
SECTION 4 - FAULT FINDING
Is hot and cold pipework crossed?
Adjust flow rates to achieve 35ºC
temp rise and check filter fitted in
turbine is not blocked with debris.
Reconnect wiring or
replace wiring harness if
head and secure clip to
Supply power to the boiler
Connect the wiring from the terminal block to the
Is the wiring connected
between PCB and DHW
Remove the turbine, and
check for debris in the
turbine & filter. Replace
turbine if necessary. Is
Replace turbine sensor
Installation and Servicing