11.1.1 General errors
Note
For the coding of the connections, refer to the Electrical wiring diagram.
Indication Cause Measure
Gas smell There is a gas leak Close the mains gas valve at once.
Do not operate any switches.
No naked flames.
Ventilate the boiler room.
Immediately contact your installation
engineer or your local gas company.
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The display is off The water heater is off. Turn on the water heater (see section 4.1).
There is no supply voltage. Make sure that:
the control switch is set to I.
the isolator is in ON position.
there is power on the isolator.
there is power to the electrical connector
block.
The measured voltage must be
230 V
AC
(-15%, +10%).
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Defective fuse(s) Replace the fuse(s).
Water leakage There is a leakage from a threaded
water connection.
Tighten the threaded connection.
There is a condensate leakage Make sure that the condensation water
discharge is working properly.
If necessary, correct the water discharge.
There is a leakage from another nearby
water heater or pipe segment.
Trace the leakage.
There is a leakage from the water heater
tank.
Contact the supplier of your water heater.
Explosive ignition The gas supply pressure is incorrect. Check the gas supply pressure, refer to Gas
supply pressure.
The CO
2
value is incorrect. Check the CO
2
value, refer to CO
2
value.
The burner is contaminated. Clean the burner, refer to
Gas-side
maintenance (see section 10.3).
There is an air leakage between the
venturi and the flexible air connector.
Make sure that:
the flexible air connector is not damaged.
If necessary, replace the flexible air
connector.
the flexible air connector is correctly
connected to the venturi.
If necessary, tighten the clamp.
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90 Installation, Maintenance and Service part
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