23
Errors and solutions
Top side of the display on the right – errors appear
Warning Er01
PROBLEM
The temperature of the water in the boiler reached 100 degrees Celsius and the safety thermostat
with manual rearmament intervened.
ACTION
After letting the boiler cool down, press the manual rearmament button of the safety thermostat
at the back of the boiler, then unlock the boiler by long-pressing the display on and off button.
CAUSE
A.
Presence of air bubbles in the system or boiler. To eliminate them use the vent valve present
of the boiler body or those in radiators.
B.
Presence of interception organs, such as shutters, which prevent heat disposal. Open any
shutters and in the case of planting in zones make sure that there is at least one open area.
C.
Circulator blocked. Place the circulator in the vent so that you can check if the engine turner
can unlock automatically, otherwise replace the boiler circulator.
D.
Incorrect technical parameters. Check the P26 parameter (hydraulic configuration). It must be
set in the way that reflects the installation of the product in question (see page 10).
E.
Faulty boiler probe. Observe the indication of the temperature of the water in the boiler on
the control display; The indication must be appropriate for the actual temperature of the
water (not 0 degrees Celsius for example). The resistance of the NTC probe that detects the
temperature of the water in the boiler must be about 10 kὨ at the temperature of 25 degrees
C and decrease as the temperature detected (to increase as the temperature drops). To
measure the resistance of the probe, it is necessary to disconnect it from the electronic control
unit; if the measured resistance is 0 ohm or is infinite the probe is to be replaced because it is
short-circuited (indication of 110 degrees C) or interrupted (indication of 0-C). If the probe's
resistance is correct but the temperature is wrong, you must replace the electronic control
unit that does not correctly interpret the temperature detected by the probe
F.
Faulty circulator. If the temperature of the water in the boiler is > 55 degrees Celsius, there is
a 230Volt Voltage (VAC) between the two N and L contacts of the circulator clamp. If this
Voltage is not present, perform the same measurement directly on terminals 7 and 8 of the
control unit to see if there is a problem with the external connection. If the Volta is not even
present on the connector, you must replace the electronic control unit that does not properly
feed the circulator. Sen the turner is unlocked and the capacitor efficient but the circulator
does not turn yet, you have to replace the circulator because it is defective.
G.
Safety thermostat and/or related faulty wiring. Ensure electrical continuity between contacts
C and 2 of the safety thermostat, the Electrical Resistance must be 0 Ohm.
H.
If the thermostat is working properly but the alarm remains, you will need to check the
electrical connection between the thermostat and the electronic control unit (the Resistance
