Overheat lockout 1 Fill system to 1.0 bar 2 Bleed radiators
3 Check radiator valves open
4 Reset boiler 5 Contact installer
Go to Frame 74
Flow Temperature Overheat Lockout
Ignition lockout 1 Check other gas appliances work
2 Reset boiler
3 Contact Installer
Go to Frame 75
Ignition Lockout
Low water pressure 1 Fill system to 1.0 bar
Go to Frame 77
Low Water Pressure
2 Bleed radiators
Flame loss 1 Check other gas appliances
Go to Frame 78
Flame Loss
2 contact installer
Too many resets Contact installer
5 Resets with 15 minutes
Turn power off and on
Fault 8 Contact installer
3 Contact installer
Go to Frame 76
False Flame Lockout
Fan fault Contact installer
Go to Frame 79
Fan Fault
Flow thermistor fault Contact installer
Go to Frame 80
Flow Thermistor Fault
Return thermistor fault Contact installer
Go to Frame 81
Return Thermistor Fault
Outside sensor fault Contact installer
Go to Frame 82
Outside sensor fault
Low mains voltage Contact electricity provider
Low mains voltage
Contact Electricity Provider
PCB Fault Contact installer
If PCB is a spare check Boiler Chip Card
(BCC) fitted otherwise replace PCB*
PCB Replaced Reset boiler
Reset the boiler
Boiler Chip Card Fault Contact installer
Go to Frame 83
BCC Fault
Go to Frame 84
No CH operation but DHW works OK
No CH operation but DHW operates OK
12 month service interval request
Contact installer
It is recommended to have the boiler serviced
Reset the boiler to clear message
Go to Frame 85
No DHW but CH operates OK
No DHW operation but CH operates OK
No Display
Go to Frame 86
No Display
Note. Boiler status display information is shown in shaded boxes below. Up to six messages will be displayed in rotation.
RESET PROCEDURE - To reset boiler, turn mode knob to reset position and immediately turn knob back to required setting.
Note that production boiler PCBs are factory pre-set to operate for boiler range and output, but when ordering Primary PCB as a spare, an
additional Boiler Chip Card (BCC) MUST also be purchased for your specic boiler range and output.