8
Malfunctioning of the heater
Removing the causes of the malfunctioning of the heater given below is not included in the
manufacturer’s guaranty. Should none of the following occur, please contact the service point.
Display does not light:
– disconnected ribbon cable connecting the controller board with the display (Fig. 2).
– failure of the electrical wiring powering the heater.
Too small flow of water:
– blocked water filter.
– too small water pressure.
– control valve closed too tightly.
– main valve not completely open.
The heater does not heat or heats poorly:
– wrong hydraulic, failure of the electrical wiring powering the heater.
The heater does not heat the water to the set temperature:
– too big drop of the mains voltage after the start of the heater.
– too big flow of water (see: point “Use”).
The display shows the number bigger than or equal to 75.0 – the heater is blocked.
– the heater has an additional thermal protection which works in the following way: when
outlet water reaches the temperature equal to or higher than 75
O
C the electrical system
will block. Not until it is turned off and then turned on again after the fall of temperature
below 75
O
C it will unblock. If such a situation occurred due to supplying pre-heated water
of the temperature higher than the permissible temperature, it needs to be decreased. In
other cases, please contact the service point.
