Glow-worm Ultrapower sxi Series - Fault Finding - Central Heating and DHW; Central Heating Fault Diagnosis; Domestic Hot Water Fault Diagnosis

50
Is the power switched on?
Switch the power on
Successful ignition
Check wires between
main PCB and display
PCB
Does the display flash 'F'
during or after a CH
demand?
Consult the Fault Table
Is there anything displayed
on the LCD?
Is the display flashing 'F'?
Initiate a CH demand.
Does the boiler light?
Adjust CH setpoint to 82
0
C
and make sure external
control is calling for a
demand. Does the boiler
light?
No No
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
No
No
No
Ye
s
START
Ye
s
No
No
No
Consult the State List
Is the power switched on?
Switch the power on
Successful ignition
Check wires between
main PCB and display
PCB
Does the display flash 'F'
during or after a DHW
demand?
Consult the Fault Table
Is there anything displayed
on the LCD?
Is the display flashing 'F'?
Initiate a DHW demand.
Does the boiler light?
Adjust DHW setpoint to
62
0
C and turn on a hot
water tap.
Does the boiler light?
No No
Ye
s
Ye
s
Ye
s
Ye
s
Ye
s
No
No
No
Ye
s
START
Ye
s
No
No
No
Consult the State List
13012
CENTRAL HEATING
DHW
13411
14 Fault Finding
Diagram 14.2