3. Lock out and reset
The unit can be reset or brought into lock out mode in two
different ways:
Internal
In the lock out case the unit can be reset by pushing the built-
in button meaning a new start-up cycle is performed.
External
Instead of using the built-in lock out button the same
function can be achieved by using an external button which
connects terminal 9 with A (see also circuit and block
diagram).
If the pushputton (internal or external) is pressed during
normal operation or during the start sequence for more then
3 sec. and afterwards released, the control box will perform
a shutdown.
Please note
The unit can only be brought to lockout mode or
be reseted if power is applied to the unit.
4. Low-voltage protection
at 220 / 240V (110 / 120V) nominal voltage
The mains voltage has to be more than 187 V
(94 V
) in
eff
eff
order to allow the unit to perform a start-up.
The mains voltage is not only monitored in the start-up
phase but also permanently during operation. If the voltage
drops below < 160 V
(80 V
) during start-up or run time
eff
eff
the control box proceed to safety shut-down and goes into
a waiting status. If the voltage rises again, the control box
performs automatically a start-up as soon as the mains
voltage is > 187 V
(94 V
) .
eff
eff
5. Safety
The design and control sequence of the DKG 972 controls
will comply with the currently applicable standards and
regulations (see also TECHNICAL DATA).