95
NO DhW BUT Ch OK
96
BLANK DIspLAy
Does the display show “ON” underneath the tap
symbol?
Are the ow rates correct as per Table 3
Does the wiring from the Main PCB to the Diverter
Valve have continuity and is fully connected
Check diverter valve head fully engaged and clip
secured onto waterset
Is there 230V between pins 1 and 3?
Replace Diverter Valve head, is DHW OK?
Replace Diverter Valve body
No Yes
Yes
No
No
No
No
No
Yes
Yes
No
No
Yes
Yes
Yes
Yes
Is the red neon illuminated on the
DHW Turbine?
Is the wiring connected between the
Main PCB and the DHW Turbine?
Remove Turbine and clear any
debris, is DHW OK?
Ensure cold inlet and hot
water outlet are not reversed
Re-connect wiring
Fit new turbine
Adjust ow rates to achieve 35
o
C
temperature rise and check lter tted in
turbine is not blocked with debris
Replace or reconnect as appropriate
Re-engage diverter valve head and
secure clip to waterset
Replace Main PCB
Is there 230Vac to the boiler at (A)?
Is the wiring from the boiler terminal block to the main
PCB connected securely?
Does the wiring from the boiler terminal block to the
Main PCB have continuity?
Is the cable from the main PCB to the user interface
PCB connected securely?
Does the cable from the main PCB to the user
interface PCB have continuity and is un-damaged?
Is the Fuse on the main PCB OK?
Replace the user interface PCB, still no display?
No
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
Yes
No
Supply power to the boiler
Connect the wiring from the terminal
block to the main PCB securely
Replace the wiring from the boiler
terminal block to the Main PCB
Connect the cable from the main PCB to
the user interface PCB securely
Replace cable from main PCB to user
interface PCB
Replace Main PCB
Replace main PCB
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