Fault Codes - Keston System s30 Installation And Servicing Instructions

8.

FAULT CODES

DISPLAY CODE ON BOILER
F 1
F 2
F 3
F 4 L 4
F 5 L 5
F 6
F 7
F 9 L 9
L 1
L 2
L 6
L C
F U
User's
DESCRIPTION
Low Water Pressure
Flame Loss
Fan Fault
Flow Thermistor
Return Thermistor
Outside Sensor Failure
Low Mains Voltage
Unconfigured PCB
Flow Temperature Overheat
or No Water Flow
Ignition Lockout
False Flame Lockout
5 Boiler Restarts in 15 minutes
Flow/Return Differential >
50°C
ACTION
Check system water pressure is between 1 & 1.5bar on the system pressure gauge. To
re-pressurise the system see Section 3. If the boiler still fails to operate then please contact
Keston (if under warranty) or alternatively a Gas Safe Registered Engineer if outside of the
warranty period. In IE contact a Registered Gas Installer (RGII).
1. Check other gas appliances in the house are working to confirm a supply is present in
the property.
2. If other appliances do not work or there are no other appliances, check the gas supply
is on at the meter and/or pre payment meter has credit. If the boiler fails to operate
then please contact Keston (if under warranty) or alternatively a Gas Safe Registered
Engineer if outside of the warranty period. In IE contact a Registered Gas Installer
(RGII).
Restart the appliance - if the boiler fails to operate then please contact Keston (if under
warranty) or alternatively a Gas Safe Registered Engineer if outside of the warranty
period. In IE contact a Registered Gas Installer (RGII).
Restart the appliance - if the boiler fails to operate then please contact Keston (if under
warranty) or alternatively a Gas Safe Registered Engineer if outside of the warranty
period. In IE contact a Registered Gas Installer (RGII).
Restart the appliance - if the boiler fails to operate then please contact Keston (if under
warranty) or alternatively a Gas Safe Registered Engineer if outside of the warranty
period. In IE contact a Registered Gas Installer (RGII).
Restart the appliance - if the boiler fails to operate then please contact Keston (if under
warranty) or alternatively a Gas Safe Registered Engineer if outside of the warranty
period. In IE contact a Registered Gas Installer (RGII).
Contact a qualified electrician or your electricity provider.
Unconfigured PCB. Please contact Keston (if under warranty) or alternatively a Gas Safe
Registered Engineer if outside of the warranty period. In IE contact a Registered Gas
Installer (RGII).
Check system water pressure is between 1 & 1.5bar on the system pressure gauge.
To re-pressurise the system see Section 4. If the boiler fails to operate then please contact
Keston (if under warranty) or alternatively a Gas Safe Registered Engineer if outside of the
warranty period. In IE contact a Registered Gas Installer (RGII).
1. Check condensate Pipe for blockages (refer to Section 3)
2. Check other gas appliances in the house are working to confirm a supply is present in
the property.
3. If other appliances do not work or there are no other appliances, check the gas supply
is on at the meter and/or pre payment meter has credit. If the boiler fails to operate
then please contact Keston (if under warranty) or alternatively a Gas Safe Registered
Engineer if outside of the warranty period. In IE contact a Registered Gas Installer
(RGII).
Restart the appliance - if the boiler fails to operate then please contact Keston (if under
warranty) or alternatively a Gas Safe Registered Engineer if outside of the warranty
period. In IE contact a Registered Gas Installer (RGII).
1. Turn electrical supply to boiler off and on.
2. If the boiler fails to operate please contact Keston (if under warranty) or alternatively
a Gas Safe Registered Engineer if outside of the warranty period. In IE contact a
Registered Gas Installer (RGII).
If the boiler fails to operate then please contact Keston (if under warranty) or alternatively
a Gas Safe Registered Engineer if outside of the warranty period. In IE contact a
Registered Gas Installer (RGII).
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