79
EN
Cod. 3542B230 - Rev. 00 - 02/2022
OMNIA S HYBRID H 3.2
Fault
code
Fault
Possible cause
Remedy
F65 ÷
F98
Combustion control spe-
cific errors
Fumes pipe clogged. Low gas pressure. Conden-
sate siphon clogged. Combustion problem or fumes
recirculation
“Check that the fumes pipes and condensate siphon are not clogged. Check
the correct pressure of the gas supply. Run the CO
2
adjustment in TEST
mode. Run the calibration procedure [AUTO SETUP], if necessary.”
A65 ÷
A97
Combustion control spe-
cific errors
“Fumes pipe clogged. Low gas pressure (A78 -
A84). Condensate siphon clogged. Combustion
problem or fumes recirculation"
“Check that the fumes pipes and condensate siphon are not clogged. Check
the correct pressure of the gas supply. Run the CO
2
adjustment in TEST
mode. Run the calibration procedure [AUTO SETUP], if necessary.”
F99
Communication fault
between the display and
control unit
“Connection cable interrupted or not inserted”
Check the connection
“Parameters misaligned between control unit and
display”
Disconnect and reconnect the power supply
Run a fault default reset
Disconnect and reconnect the power supply
A98
Too many SW errors or
error appeared for board
replacement
Replace the board
“Reset the fault and proceed with the calibration procedure [AUTO SETUP].”
“Fumes pipe clogged.
Low gas pressure. Condensate siphon clogged.
Combustion problem or fumes recirculation.”
“Resolve the problem first, reset the fault and check correct ignition. Run the
calibration procedure [AUTO SETUP]. Replace the board, if necessary.”
A99
Generic error
Electronic board hardware or software error
“Reset the fault and check correct ignition. Run the calibration procedure
[AUTO SETUP]. Replace the board, if necessary, of the problem persists.”
F96
Flame combustion specific
errors
Flame unstable or flame signal unstable after
ignition.
“Check the gas supply, fumes and condensate drain pipes. Check the correct
position and status of the electrode. After about 3 minutes, the error is reset.”
A44
Multiple requests error
Repeated requests for short period
“Check if there are any pressure peaks in the DHW circuit. Change parameter
b11, if necessary.”
A80
Parasitic flame signal after
valve closure
Electrode problem. Gas valve problem. Electronic
board problem.
“Check the correct position and status of the electrode.
Check the electronic board. Check the gas valve and replace it, if necessary.”
13. MAINTENANCE
In order to ensure optimal availability of the unit, a number of checks and inspections on the unit and the field wiring have to be carried out at regular intervals.
IMPORTANT
HAZARD
All maintenance work and replacements must be carried out by skilled qualified personnel.
Before carrying out any operation inside the indoor unit, disconnect the power and close the gas cock upstream.
Otherwise there may be a danger of explosion, electric shock, suffocation or poisoning.
Do not touch the refrigerant circuit pipes and the internal parts (pump, safety valve, etc.) during and immediately after switching off the unit as they can be very hot or
very cold, causing sucking or burning or freezing. To avoid injury, allow sufficient time for the temperature of the pipes to drop to normal values and wear protective
gloves.
Before carrying out any maintenance or repair work, always disconnect the power supply to the unit and to all electrical loads (pumps, valves, electric heater for DHW
boiler and plant, etc.).
Some electrical components may be very hot.
Due to the risk of high residual voltage, after having disconnected the power supply to the outdoor unit, wait at least 10 minutes before touching live parts.
The compressor oil heater can work even if the compressor is stopped.
Make sure not to touch powered electrical cables.
Do not wash the unit. This may cause electric shocks or fire.
When the service panels are removed, live parts could easily be touched by mistake.
Never leave the unit unattended during installation or maintenance when the service panel has been removed.
It is not allowed to tamper with or modify any component, nor the settings of the intervention values of the protection devices installed in the unit.
Do not pull, disconnect, twist the electric cables coming from the unit even if disconnected from the power supply.
It is forbidden to leave containers of inflammable substances near the unit.
Do not touch the appliance with bare feet or with wet or moist parts of the body.
The checks described must be performed at least once a year by qualified personnel.
Electrical cabinet
Carry out a thorough visual inspection of the components of the electrical panel to check for damaged or incorrectly connected components or cables (check the tight-
ness of the terminal screws).
