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Fault Possible cause Corrective action
Insufficient
hot water, or
none at all
Water
leakage
Set the temperature regulator at a
lower temperature and reignite the
pilot burner.
Reduce the consumption of hot water.
Allow the appliance time to heat the
water.
Turn the control button to the (l)
position. Close the gas tap and inform
your installer.
See “Condensation”.
Tighten the threaded connections.
Trace the cause.
Reduce your hot water use. Allow the
appliance enough time to warm up
water.
Safety thermostat has
closed the gas supply
because the water
temperature was too high
Hot water storage empty
Cause cannot be
determined
Condensation of (flue)
gasses
Insufficient sealing of the
water connections
(thread)
Leakage from other
water- appliances or
pipes near by
Condensation leakage
from the underside of the
appliance (usually during
the first warming-up
period).