210-0203_Libretto_SX-ind_ATI_2021-02_GB.docx
22
Ed 2021-02
22.
PERIODIC MAINTENANCE
To ensure the safety of the appliance and extend its life, it is mandatory to have it checked at least once a year by an authorized
service center, which will carry out the following operations:
replacement of the magnesium anode
internal inspection of the boiler and possible cleaning of the calcium deposited on the bottom
check the tightness of the gas pipe
burner maintenance
23.
PREVENTION AGAINST FROST
If the appliance is switched off and exposed to very low temperatures, it will be necessary to empty the water tank to prevent
the risk of freezing
24.
POSSIBLE OPERATING DEFECTS
Any component replacement operations must be carried out by personnel authorized by the manufacturer.
The control equipment locks out without commanding the ignition.
the flame detection circuit of the control equipment is faulty and the control self-test does not allow the cycle to
continue
the flame detection electrode has a ground dispersion
At the end of the pre-purge phase, the ignition electrode does not spark and the control equipment locks out.
the ignition transformer is faulty
the connection of the ignition electrode to the terminal board of the equipment is interrupted
At the end of the pre-purge phase the ignition electrode gives off a spark, but the flame does not form and the appliance locks
up.
there is no gas supply or there is air inside the pipe
the gas valve does not open because the coils are faulty or their electrical connection is interrupted
At the end of the pre-purge phase, the ignition electrode gives off a spark, the flame forms, but the appliance locks up.
the flame does not stabilize properly due to lack of gas pressure
the detection electrode is not correctly positioned and is not in contact with the flame
the electrical connection of the detection electrode is interrupted
The equipment locks up during normal operation.
the gas supply was interrupted, even if momentarily: the appliance, not detecting the presence of a flame, went into
lockout
one of the cases of the previous point has occurred during an intermittent operating cycle.
The generator runs for short intermittent periods, even if the thermostat is working properly and is in the heat demand position.
the regulation thermostat is faulty and does not correctly detect the water temperature
the pressure switch stops the burner because the fan flow rate is not correct, due to an obstruction of the ducts or an
excessive length of the same.
The control equipment is not blocked but the cycle remains in anticipation.
the differential pressure switch does not allow the cycle to continue because the smoke evacuation ducts or the air
intake are blocked
the pressure switch does not allow the cycle to continue because the fan does not work and does not exert sufficient
pressure
the differential pressure switch does not give consent because it is faulty or its electrical connection is interrupted
the differential pressure switch does not give consent because the pressure intake tube is clogged or the silicone tube is
detached or broken.
The control equipment is not blocked but the cycle does not start.
during the initial check by the equipment, the contacts of the pressure switch were found in the closed position
(because they are stuck or due to an incorrect calibration of the pressure switch itself) and consequently no consent is
given to continue the cycle
check if the printed circuit board fuse has blown
