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61
Product
presentation
Installation
Settings /
Operation
Maintenance,
Servicing and
Troubleshooting
Warranty
4.3. Other malfunctions without displaying error codes
Malfunction
Possible cause
Diagnosis and troubleshooting
No more heating
No hot water
No power supply to the water heater:
fuse, wiring …
Vérifier la présence de tension sur
les fils dʼalimentation
Vérifier les paramètres de
lʼinstallation (voir les plages de
fonctionnement)
Water insufficiently warm.
The main supply to the water heater is
not continuous.
Check if the power supply to the unit
is continuous.
Check if there is no return of cold
water on the hot water circuit (mixing
valve may be defective).
The set point temperature is too low. Increase the set point temperature.
ECO mode selected & off-range air
temperatures.
Select AUTO mode. Check the
lengths of the programming ranges.
Malfunction of the heating component
or wiring partially defective.
Check the spark plug resistance on
the spark plug harness connector, as
well as the condition of the harness.
Check the safety thermostat.
Insufficient amount of hot water.
The water heater is too small
Check if Off-peak hours is indicated.
ECO mode operation
Turn the dial to activate normal
operation.
Low output at the hot water faucet.
The filter of the safety unit is clogged. Clean the filter (see section
Maintenance).
Scaling of the water heater.
Descale the water heater.
Continuous water leaking from the
safety unit outside heating periods.
Damaged or dirty safety valve.
Replace the safety unit
Pressure of the main water supply is
too
High.
Check if the pressure at the water
meter outlet does not exceed 0.5
MPa (5 bar), otherwise install a
pressure reducing device set at 0.3
MPa (3 bar) at the beginning of the
general water system.
The electric booster pump does not work. Mechanical thermostat safety.
Reset the safety of the thermostat at
the level of the resistance.
Faulty electrical thermostat.
Replace the thermostat.
Defective resistance.
Replace the resistance.
Condensate overflow.
Condensate drainage obstructed
Clean.
Smell.
No siphon on the safety unit or at the
level of condensate drainage.
Install a siphon.
No water in the siphon of the safety
unit.
Fill the siphon.