Central Heating - Glow-worm Ultrapower 100sxi Installation And Servicing

START
Is there anything displayed
Yes
Is the display flashing 'F'?
No
Initiate a DHW demand.
No
Adjust DHW setpoint to
62 C and turn on a hot
0
water tap.
Does the boiler light?
No
Consult the State List
38
13 Fault Finding

CENTRAL HEATING

No
Is the power switched on?
Yes
Consult the Fault Table
Yes
Successful ignition
Yes
No
DHW
No
Yes
Yes
Does the display flash 'F'
Yes
during or after a DHW
No
Switch the power on
Check wires between
main PCB and display
PCB
demand?
Diagram 13.3