18 fault finding – Glow-worm 30ci Plus User Manual
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18 Fault Finding
spark' and 'F' and 'flashing red LED'
Ignition fault (lockout) caused by no gas, no detection
DISPLAY FAULT
'fan' and 'F' and 'flashing red led'
Air fault, pressure switch, no power to fan
'05' and 'phone' and 'F' and 'flashing red LED'
Overheat fault
'06' and 'phone' and 'F' and 'flashing red LED'
Central heating flow NTC fault
'09' and 'phone' and 'F' and 'flashing red LED'
Water pressure sensor fault
'11' and 'phone' and 'F' and 'flashing red LED'
No reception by the main board (MMI Lead)
'12' and 'phone' and 'F' and 'flashing red LED'
User interface or distant control panel fault
'13' and 'phone' and 'F' and 'flashing red LED'
Main board fault
'15' and 'phone' and 'F' and 'flashing red LED'
Stepper motor fault (gas valve)
'16' and 'phone' and 'F' and 'flashing red LED'
Gas safety value failure
'17' and 'phone' and 'F' and 'flashing red LED'
Power supply <170V
'18' and 'phone' and 'F' and 'flashing red LED'
Local user interface fault
'19' and 'phone' and 'F' and 'flashing red LED'
Central heating NTC not connected to pipe
'20' and 'phone' and 'F' and 'flashing red LED'
User interface not compatible with boiler
'0.5bar' flashing and 'F' and 'flashing red LED'
Lack of water fault (<0.5b)
'2.7bar' flashing and 'F' and 'flashing red LED'
Upper water pressure (>2.7b)
'14' and 'phone' and 'flashing red LED'
Over temperature on primary water circuit
'08' and 'phone' and 'F' and 'flashing red LED'
Micro accumulation vessel NTC fault
11669
10301
FAULT: NO HEATING
Are the external heating
controls calling for heat?
Is the polarity correct?
Rectify fault on external controls.
NO
Rectify, check the 230V
controls board.
NO
Faulty main PCB.
NO
YES
Connect 1 and 2 on J10,
does boiler fire in central heating?
YES
Faulty 230V controls board.
YES