F0
Failed to measure hot
water temperature.
Not LOCKED OUT
F1
1st ignition failure.
The burner is not
ignited.
LOCK OUT
Activation of the
combustion product
discharge control
device (air pressure
switch).
LOCK OUT
Failure during
operation.The burner
switchs off. Try to
reignite the
appliance.
LOCK OUT
TTB jumper
connector is missing
When ON/OFF button is pressed green
LED does not light
Green LED is lighting but heater does
not work
F2
F3
F4
Check heater is plugged pro-
perly to the mains. Blown fuse in
the power circuit.Blown fuse in
the plug.
Check wiring connections bet-
ween power circuit and electro-
nic circuit.Defective electronic
circuit.
10
USER
6.- TROUBLESHOOTING & FAULT CODES
Code
Description
Cause
Solution
Fault in the NTC sensor or
defect in wiring.
Call to technical service.
Check the NTC and the wiring
Gas tap closed.
Open the gas tap.
Gas bottle empty.
Replace the gas bottle.
Air in the gas circuit.
Repeat the ignition operation until
appliance ignites.
Wiring in disrepair or improperly
connected.
Repeat the ignition operation.
Check the wiring, the electronic cir-
cuit, the servo valve and electrodes.
If the fault persists call to the technical
sevice and replace the defective
component.
Check pressure switch and wiring.
Review the exhaust fumes outlet.
If the fault persists, contact technical
service.
Repeat the ignition operation.
Check the wiring, the electronic
circuit, the servo valve and
electrodes.
If the fault persists call to the technical
sevice and replace the defective
component.
Connect the jumper.
Check the wiring and connections.
Connect the heater.
Replace the blown fuse.
If the fault persists, contact technical
service.
Connect the wirings properly.
Replace electronic circuit.If the fault
persists, contact technical service.
Electronic circuit fault.
Servo Valve fault.
Ionization electrode fault.
Exhaust fumes outlet blocked.
Gas bottle empty.
Wiring in disrepair or improperly
connected.
Electronic circuit fault.
Servo Valve fault.
Ionization electrode fault.
Lack of the jumper.Wiring in dis-
repair or improperly connected.
Combustion product discharge
control device (air pressure
switch) or defective wiring.
spark fault
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