
22
/
APPLIANCE PROTECTION DEVICES
Appliance shut-off conditions
The appliance is protected from malfunctions by means of
internal checks performed by the electronic P.C.B., which
stops the appliance from operating if necessary.
In the event of the appliance being shut off in this manner,
a code appears on the control panel display which refers
to the type of shut-off and the reason behind it.
Switch off the appliance. Make sure the external electric
switch is in the OFF position, shut off the gas valve and
contact a qualified technician.
Table summarising error codes
Error code Description
A 1
No flame detected
- Gas valve closed
Open the manual valve and follow the activation
procedure
- Check the ignition electrode
- Check the detection electrode
A 2
Overheating
- A temperature higher than 85°C has been detected.
Check the water pressure
A 3
Pipe blockage error
- Check the exhaust outlet and ambient condition
A 4
Flame lift
- Check the ignition electrode
- Check the detection electrode
- Check the supply voltage of the P.C.B.
- Check the gas supply pressure
- Check the exhaust cover if blocked
A 6
Hot water temperature
sensor error
- Check the Hot Water temperature sensor
A 7
Cold water temperature sensor error
- Check the Cold Water temperature sensor
A 8
Comunication error
- Check the connection between HMI P.C.B and Main P.C.B
- Check the P.C.B
- Check the HMI P.C.B
A A
Too many reset (> 5 reset in 15 minutes)
- Plug off and then plug on
E 6
False flame
- Check the detection electrode
- Check the P.C.B.
E 7
Fan error
- Check the P.C.B. and fan
E 9
P.C.B. error
- Switch OFF the appliance and restart after 30 seconds
- Check the P.C.B.
E E
P.C.B. error
- Switch OFF the appliance and restart after 30 seconds
- Check the P.C.B.
E F
P.C.B. error
- Press twice the ON/OFF button and restart
the appliance