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
Check system water pressure is between 100 & 150kPa (1 - 1.5 bar) on the system
pressure gauge. To re-pressurise the system see Section 3. If the boiler still fails to
operate then please contact Hunt Heating(if under warranty) or alternatively a Licensed &
Registered Engineer if outside of the warranty period.
Flame Loss
1. Check other gas appliances in the house are working to confirm a supply is present in
2. If other appliances do not work or there are no other appliances, check the gas supply
Fan Fault
Restart the appliance - if the boiler fails to operate then please contact Hunt Heating
(if under warranty) or alternatively a Licensed & Registered Engineer if outside of the
warranty period.
Flow Thermistor
Restart the appliance - if the boiler fails to operate then please contact Hunt Heating
(if under warranty) or alternatively a Licensed & Registered Engineer if outside of the
warranty period.
Return Thermistor
Restart the appliance - if the boiler fails to operate then please contact Hunt Heating
(if under warranty) or alternatively a Licensed & Registered Engineer if outside of the
warranty period.
Outside Sensor Failure
Restart the appliance - if the boiler fails to operate then please contact Hunt Heating
(if under warranty) or alternatively a Licensed & Registered Engineer if outside of the
warranty period.
Low Mains Voltage
Contact a qualified electrician or your electricity provider.
Unconfigured PCB
Unconfigured PCB. Please contact Hunt Heating (if under warranty) or alternatively a
Licensed & Registered Engineer if outside of the warranty period.
Flow Temperature Overheat
Check system water pressure is between 100 & 150kPa on the system pressure gauge.
To re-pressurise the system see Section 4. If the boiler fails to operate then please contact
or No Water Flow
Hunt Heating (if under warranty) or alternatively a Licensed & Registered Engineer if
outside of the warranty period.
Ignition Lockout
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
3. If other appliances do not work or there are no other appliances, check the gas supply
False Flame Lockout
Restart the appliance - if the boiler fails to operate then please contact Hunt Heating
(if under warranty) or alternatively a Licensed & Registered Engineer if outside of the
warranty period.
5 Boiler Resets in 15 minutes
1. Turn electrical supply to boiler off and on.
2. If the boiler fails to operate please contact Hunt Heating (if under warranty) or
Flow/Return Differential >
If the boiler fails to operate then please contact Hunt Heating (if under warranty) or
alternatively a Licensed & Registered Engineer if outside of the warranty period.
50°C
ACTION
the property.
is on at the meter and/or pre payment meter has credit. If the boiler fails to operate then
please contact Hunt Heating(if under warranty) or alternatively a Licensed & Registered
Engineer if outside of the warranty period.
the property.
is on at the meter and/or pre payment meter has credit. If the boiler fails to operate then
please contact Hunt Heating (if under warranty) or alternatively a Licensed & Registered
Engineer if outside of the warranty period.
alternatively a Licensed & Registered Engineer if outside of the warranty period.
7
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