Cuenod C24 GX507/8, Operating Instructions Manual, Page: 11 / 48

02/2008 - Art. Nr. 13 019 866A 11
Push on R
during...
… causes …
… less than 9
seconds... release or locking
of the control unit.
… between 9 and
13 seconds... erasing of the
statistics in the
control unit.
… more than 13
seconds... no effect on the
control unit.
Start-up
Control unit characteristics
Unit SG 513 operation diagram
The SG 513 GAS control unit is an
intermittent service unit (limited to
twenty-four hours of continued use)
whose program is managed by a
microcontroller. It also analyses
malfunction, via codified light signals.
When unit is faulty, the R switch light is
on. Every ten seconds, the trouble code
appears until unit is reset.
Thanks to the non-volatile
microcontroller memory, it can be
consulted later.
The unit stops without a signal, if voltage
is below its minimum value, and restarts
automatically, as soon as voltage is
back to normal.
In continual functioning a thermostatic
cut-out is
obligatory after twenty-four
hours.
Unit removal and installation
operations must be performed with
the power off. The unit
must not
be opened or repaired .
Code Type of fault
❘ ❙ ❙ ❙ ❙ ❘ ❙ ❙ ❙ ❙ ❘ ❙ ❙ ❙ ❙ ❘ ❙ ❙ ❙ ❙
No flame signal at end of safety time
❘ ❘ ❙ ❙ ❙ ❘ ❘ ❙ ❙ ❙ ❘ ❘ ❙ ❙ ❙ ❘ ❘ ❙ ❙ ❙
Parasitic light during preventilation and preignition
❘ ❘ ❘ ❙ ❙ ❘ ❘ ❘ ❙ ❙ ❘ ❘ ❘ ❙ ❙ ❘ ❘ ❘ ❙ ❙
Air pressure switch: contact does not close
❘ ❘ ❘ ❘ ❙
❘ ❘ ❘ ❘ ❙ ❘ ❘ ❘ ❘ ❙
❘ ❘ ❘ ❘ ❙
Air pressure switch: contact opens during start up or operation.
❙ ❙ ❘ ❘ ❘ ❙ ❙ ❘ ❘ ❘ ❙ ❙ ❘ ❘ ❘ ❙ ❙ ❘ ❘ ❘
Air pressure switch: contact is welded.
❙ ❙ ❙ ❙ ❘ ❙ ❙ ❙ ❙ ❘ ❙ ❙ ❙ ❙ ❘ ❙ ❙ ❙ ❙ ❘
Flame disappears during operation.
❘ ❘ ❙ ❙ ❙ ❘ ❘ ❙ ❙ ❙ ❘ ❘ ❙ ❙ ❙ ❘ ❘ ❙ ❙ ❙
—
❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙ ❙
Unit voluntarily stopped.
Code Key
❘❘❘❘
❙❙❙❙
—
Short light signal
Long light signal
Short pause
Long pause
More detailed information about trouble and operation mode can be taken out of SG 513 unit using specific equipment.
Required input signals
Output signals
Limiter Air pressure switch Burner motor Fuel valve Regulator Ignition transformer Flame monitor Servomotor Fault Reset
1 Powering up the unit, motor and S.M.
2 Checking if air is present
3 End of preventilation
4 Powering up the ignition transformer and end of
preventilation
5 Powering up the fuel valve
6 Checking if the flame is present
7 Powering up the S.M. and fuel valve; operating speed
0 Regulator stop
10 Trouble mode
tlw Air pressure switch standby time
tlk Servomotor opening time and preventilation count down
tr Servomotor closing time
tvz Preignition time
ts Safety time
tv2 Minimum time between fuel valve 1 and 2