Close Control Regulation Program
58 06MC0071@00B0110
01/10/2012
HUMIDIFIER ALARMS
Active when the corresponding threshold is exceeded for more than an
hour, or alternatively instantly when the conductivity of the supply
water is three times higher than the corresponding high conductivity
threshold. Disables operation of the humidifier.
This may be shown in the following three cases:
1. drain to dilute, if a sufficient decrease in current is not
measured and if the evaporation time is below certain limits;
2. wash-antifoam status, if at the end of the drain cycle the water
touches the high level electrodes;
3. pre-wash status, if during the period in which 10 minutes of
simultaneous drain and fill cycles are performed, the water
touches the high level electrodes.
Active if the water touches the high level electrodes in one of the
following cases:
1. the unit is disabled or shutdown (remote control switch, fill and
drain OFF);
2. before the start of the first pre-wash cycle (consisting of 10
minutes of simultaneous drain and fill cycles)
The current running through the electrodes is checked constantly
during the operation of the humidifier. Nonetheless, whenever the unit
restarts following a production request, the current is checked to see if
it exceeds a precise current profile.
This alarm is displayed if the following events occur in sequence:
•
in the fill phase
•
the difference between the current measured and the start fill
current is lower than a threshold calculated on the current
target or in steady operation
•
the water touches the high level electrodes
•
the current measured is lower than a threshold calculated on
the rated current.
If during low production (after a drain due to high level) the end fill
current is lower than a certain threshold calculated on the rated
current.
