Operations manual AQUASTOP
®
II
Carl Roth GmbH + Co. KG
13
The cooling water flow surveillance works in a simi-
lar manner : If the flow approaches the programmed
limit value (see chapter 7.2), a pre-alarm sounds if
the tolerance value (see chapter 7.3) is reached.
The red LED „Flow low“ flashes, an acoustical alarm
sounds at the same time. If the limit flow value is
reached, the heater as well as the solenoid valve
are definitely switched off (yellow LEDs „Heating“
and „Solenoid valve“ are extinguished), the red LED
„Flow low“ lights continuously and the floating con-
tact for external alarm is activated. The flow indica-
tion on the display flashes.
An acknowledgement of the pre-alarms is not ne-
cessary, as soon as the temperature or the water
flow are again outside the programmed tolerance
range, the pre-alarm stops.
On the contrary, the final alarm provokes a definite
switching-off, which can only be recycled by pres-
sing the green „R“-key (6). This key causes a
complete initialisation of the unit, shown by a circ-
ling digit display indication. During 50 sec., all
alarms are inhibited, the heater as well as the sole-
noid valve are switched on again. If the failure is not
corrected (increase water flow or adjust the alarm
values), the alarms are re-engaged and act accor-
dingly.
