Cuenod C120 GX507/8, Operating Instructions Manual

Page: 13 / 56

03/2008 - Art. Nr. 13 013 477C 13
Limiter Air pressure switch Burner motor Gas valve Regulator Ignition transformer Flame Servomotor Trouble Reset
1 Powering up unit, motor and S.M.
2 Checking if air is present
3 End of preventilation
4 Powering up ignition transformer and end
of preventilation
5 Powering up gas valve
6 Checking if flame is present
7 Powering up S.M. and gas valve; operation state
0 Regulator stop
10 Trouble mode
tlw Air pressure switch standby time
tlk Damper motor opening time and preventilation
count down
tr Damper motor closing time
tvz Preignition time
ts Safety time
tv2 Minimum time between gas valve 1 and 2
Required input signals
Output signals
Start-up
Control and safety unit characteristics
Unit SG 513 operation diagram
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.
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
— The unit has been purposely shutdown
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.
The SG 513 GAS control and safety unit
is an intermittent service unit (limited to
twenty-four hours) 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 functioning a thermostatic cut-out is
obligatory after twenty-four hours.
Unit removal and installation
operations must be performed with
power off. The unit
must not be
opened or repaired.