Troubleshooting - Ferroli DIVATOP D HF Instructions For Use, Installation & Maintenance

Periodic check
To ensure proper operation of the unit over time, have qualified personnel carry out a yearly inspection, providing for
the following checks:
• The control and safety devices (gas valve, flow switch, thermostats, etc.) must function correctly.
• The fume exhaust circuit must be perfectly efficient.
(Sealed chamber boiler: fan, pressure switch, etc. - The sealed chamber must be tight: seals, cable glands, etc.)
(Open chamber boiler: anti-backflow device, fume thermostat, etc.)
• The air-fume end piece and ducts must be free of obstructions and leaks
• The burner and exchanger must be clean and free of deposits. For cleaning do not use chemical products or wire
brushes.
• The electrode must be properly positioned and free of any deposits.
• The gas and water systems must be tight.
• The water pressure in the system when cold must be approx. 1 bar; otherwise bring it to that value.
• The circulating pump must not be blocked.
• The expansion vessel must be filled.
• The gas flow and pressure must match that given in the respective tables.

3.4 Troubleshooting

Diagnostics
LCD display Off
If, even after touching the buttons, the display does not come on, check that the card is electrically powered. Using a
digital multimeter, check for presence of power.
In case of no voltage, check the wiring.
If the voltage is sufficient ( Range 195 – 253 Vac), check the fuse (3.15AL@230VAC). The fuse is on the card.
LCD display On
In case of operation problems or faults, the display shows the fault identification code.
There are faults that cause permanent shutdowns (indicated with the letter "A"): to restore operation just press the bu-
tton until the message "Confirm?" appears and confirm with the button
(optional) if installed. If the boiler does not restart, the fault must be eliminated.
Other faults cause temporary shutdowns (indicated with the letter "F") which are automatically reset as soon as the va-
lue returns within the boiler's normal working range.
74
= =
fig. 40- Electrode positioning
cod. 3540000180 - Rev. 00 - 05/2023
DIVATOP D HF
, or RESET via the remote timer control
EN