Unical !DEA AC 23 - Page 73

37
10 
DIFFICULT
TN: Check the ue draught or the ue gas
thermostat 
TFS: Check the operation of the fan and
its pressure switch .
Any ue obstructions. Make sure the ue
gas exhaust collector is not present with
longer lengths than the manufacturer limit.
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 
No gas or failed burner ignition
Check the gas supply and that the ignition/
detection electrode is working properly.
Pressure shut-off valves.
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 PARASITE FLAME
Flame detected upon ignition

Check the wiring of the Ign/Det. electrode
and remove any oxidation, press the un-
block key, if the anomaly persists, replace
the electrode.
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16 INTERNAL ERROR Replace the electronic board
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 
Power supply voltage too low
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19 ERROR
CONFLICT
FIRMWARE
Replace the electronic board
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20 ERROR
CIRCUIT
FLAME
Replace the electronic board
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21 ERROR
DRIVER VALVE
GAS
Replace the electronic board
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 ERROR
MEMORY
INTERNAL
Replace the electronic board
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 ERROR
RESET BUTTON ALWAYS ACTIVE
Check if the button is jammed or glued to
the board.
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 
REMOTE RESETS
The error code appears after 5 resets in
15 minutes
Disconnect and connect voltage to delete
the error code.
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