Cooker Burner (Control Box Type - DKO 970)
In case of failure the LED is permanently illuminated. Every 10 seconds the illumination is interrupted by a flash code which
indicates the cause of the error. Therefore the following sequence is performed which is repeated as long as the unit is
not reset.
Sequence:
Stray Light Monitoring
The stray light check is performed at the end of the pre-purge timer for the duration as mentioned in the table of timings.
Low-voltage protection
at 220 / 240V (110 / 120V) nominal usage
The mains voltage has to be more than 187V
eff (94Veff) in order to allow the unit to perform a start-up.
The mains voltage is not only mentioned in the start-up phase but also permanently during operation. If the voltage drops
below <160Veff (80Veff) during start-up or run time the control box goes into lock-out mode. If the voltage rises again, the
control box performs automatically a start-up as soon as the mains voltage is >187Veff (94Veff).
Fault Finding
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