Glow-worm Flexicom 24cx - Central Heating

43
Is the power switched on?
Switch the power on
Successful ignition
Check wires between
main PCB and display
PCB
Consult the State Table
Normal operation
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 DHW demand.
Does the boiler light?
Adjust DHW setpoint to
60
0
C and turn on a hot
water tap.
Does the boiler light?
No No
Ye
s
Ye
s
Yes
Ye
s
Ye
s
No
No
No
Ye
s
START
Ye
s
No
No
No
Is the power switched on?
Switch the power on
Successful ignition
Check wires between
main PCB and display
PCB
Consult the State Table
Normal operation
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
13012
Diagram 13.2
CENTRAL HEATING
DHW
13015
13 Fault Finding