13
Filling tap
fig. 5
1.5.
Boiler shutdown
The boiler shuts down automatically if a malfunction occurs.
Refer to Tables 1 and 2 to identify the boiler operating mode.
Refer to Table 2 and section 6 to identify possible causes of the shutdown. The troubleshooting section is at the end of this manual.
Below is a list of kinds of shutdown and the procedure to follow in each.
1.5.1. Burner shutdown
If the burner shuts down as there is no flame, the burner shutdown symbol
is displayed and code E01
flashes.
If this happens, proceed as follows:
• check that the gas cock is open and light a gas ring for example to check the gas supply;
• if the gas supply is normal, turn selector 2 to the reset
position for a few seconds, then back to the desired position. If after three
attempts the burner still fails to ignite, contact an Authorised Service Centre or a qualified service engineer.
If the burner shuts down frequently, there is a recurring malfunction, so contact an Authorised Service Centre or a qualified service
engineer.
1.5.2. Shutdown due to overheating
If the water temperature is too high, the boiler will shut down. The burner shutdown symbol
is displayed
and code E02 flashes. Contact an Authorised Service Centre or a qualified service engineer.
1.5.3. Shutdown due to air/flue gas system malfunction
If the air/flue gas system malfunctions, the boiler shuts down. The burner shutdown symbol
is displayed
and code E03 (for model BTN) or code E20 (for model BTFS) flashes.
Contact an Authorised Service Centre or a qualified service engineer.
1.5.4. Shutdown due to insufficient water pressure
If the water pressure in the heating system is too low, the water pressure switch activates and the boiler shuts down. The boiler
shutdown symbol
is displayed and code E04 flashes.
Open the filling tap to fill the system (fig. 5). The pressure with the boiler cold must be 1-1.3 bar.
Proceed as follows to restore the correct water pressure:
• Turn the filling tap (fig. 5) anticlockwise to allow water to aenter the boiler.
• Keep the tap open until the pressure gauge shows a value of 1-1.3 bar.
• Turn the tap clockwise to close it.
• If the boiler still does not work, turn selector 2 to the RESET
position for a few seconds, then back to the desired position.
If the boiler still fails to operate, contact an Authorised Service Centre or a qualified service engineer.
Make sure you close the tap carefully after filling.
If you do not, when the pressure increases, the safety valve may activate and discharge water.
