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10 FAULTS
10.1 Fault codes
The following fault codes can be established:
IMPORTANT
► Using the fault code table below to
establish the cause of the issue before
attempting to reset the boiler.
NOTE: A reset is not possible when a
component is outside its tolerance
values.
Viewing fault codes
Resetting the boiler
If the boilers PCB detects a fault, this is indicated by a
flashing service symbol
on the display. A fault code, such
as F004F004, is illuminated on the le display.
The service symbol remains flashing until the boiler has
reset or where required the faulty component has been
replaced.
Reset
2sec
Fault code illuminated
The boiler can be reset by touching the flashing Service
button and holding it for 2 seconds. If the fault code
reoccurs an Intergas trained engineer should be requested.
Fault code Description Possible cause / solution
F000F000
Sensor S0 is defective. ► Replace heat exchanger sensor S0.
F001F001
Temperature is too high
during central heating
demand.
► Vent the heating system & boiler heat exchanger (see §8.2.1).
► Pump does not operate (check power, impellor, replace pump.
► Check wiring to the CH flow sensor S1 (ensure its connected and
not damaged).
► Check the CH flow sensor S1 (is located and installed correctly)
► Check for the correct operation of CH flow sensor S1.
► Replace central heating flow sensor S1.
F002F002
Temperature too high
during DHW demand.
► Check wiring to the DHW sensor S3 (ensure its connected and not
damaged).
► Check the DHW sensor S3 (is located and installed correctly).
► Check for the correct operation of DHW sensor S3.
► Replace domestic hot water sensor S3.
F003F003
Flue gas temperature is
too high.
► Check heat exchanger for contamination or debris.
► Check the flue / chimney for blockages.
F004F004
No flame during start-up.
► Gas valve is faulty or no power from PCB (24v dc pins 1 & 5).
► Gas inlet working pressure below 17mbar (20mbar
recommended).
► Condensation drain is blocked or frozen.
► Check ignition module, ignition pin, lead or spark gap.
► No power to Ignition unit.
► Poor earth to boiler or ionisation pin.
F005F005
Flame failure during
normal operation.
► Condensation drain is blocked or frozen.
► Gas inlet working pressure below 17mbar (20 mbar
recommended).
► Check ignition module, ignition pin, lead or spark gap.
► Check adjustment of gas valve (See §9.10.1).
► Check the flue integrity for possible re-circulation or blockages
► Poor earth to boiler or ionisation pin.
F006F006
Flame simulation.
► Replace faulty gas valve.
► Replace faulty PCB.
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