Glow-worm Xtrafast 96-120 - Manual (Page 21)

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The XTRAFAST incorporates a visual display that indicates
fault conditions, should they occur.
In the event of a fault, the display will indicate, by means of
pictograms and/or letters and numbers, exactly in which area
the fault lies.
Should the boiler fail to operate during Commissioning, the
most likely fault is that the gas supply to the boiler has not been
turned on or purged sufficiently or that there is no pressure in the
heating system. These are indicated as follows :
13 Safety Devices
13.3 Other faults
These are indicated on the display by a fault code and a
telephone symbol. Further information on the fault codes can
be found in the 'Section 17 Fault Finding'.
General safety devices
13.4 Air flow rate safety device
If an obstruction, even partial, of the flue occurs, for any reason
whatsoever, the built in safety system of the boiler will turn the
boiler OFF and the fan will continue to run.
The boiler will be ready to operate when the fault has been
cleared.
13.5 Overheat safety
In case of boiler overheating, the overheat thermostat will turn
the boiler off. The thermostat will need to be manually reset. To
do this remove the front panel and sealed chamber cover,
locate the reset button on the heat exchanger flow pipe, refer
to Sections 16.3, 16.4, 16.5 and diagram 19.15.
13.6 In case of power supply failure
The boiler no longer operates.
As soon as power supply is restored, the boiler will be
automatically restarted.
13.7 Frost protection
The XTRAFAST has a built in frost protection device that
protects the boiler from freezing. If the boiler is to be left and
there is a risk of frost, ensure that the gas and electrical supplies
are left connected. The frost protection device will light the boiler
when the temperature of the boiler water falls below 6
° C. When
the temperature reaches 16 ° C, the boiler stops.
Note : This device works irrespective of any room thermostat
setting and will protect the complete heating system.
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0.3
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This will be indicated on the
display as a pictogram of a
spark. To rectify this, proceed
as follows:
13.1 No gas supply
• Switch off the boiler at the On/Off
push button.
• Rectify the gas supply problem.
• Restart the boiler by pressing the
On/Off button.
13.2 Insufficient system pressure
This will be indicated on the
display as a flashing warning
indicating the system pressure
is low. To rectify this the system
must be re-filled, refer to
'Section 12 Commissioning'.