Production safety and malfunctions
30
© Lutz-Jesco GmbH 2020
BA-62010-01-V01
Chlorine Dioxide System
EASYZON Dd
Operating Instructions
11 Production safety and malfunctions
The main safety devices that ensure the proper operation of the machine
are listed herebelow:
11.1 Inductive flow sensors
11.1.1 Alarm description
They monitor the actual dosing of the reagents. Each pulse from the do-
sing pumps shall correspond to a pulse from the flow sensor that will sig-
nal the passage of the fluid. The sequential and continuous lack of 8 con-
secutive pulses on the same dosing pump shall stop the production and
operation of the machine. The message
no … dosage
is displayed.
Press the
alarm
key to Enter the alarm details signaling which pump
stopped production.
REMOTE SIGNALING: Closed contact to terminals 51 – 52.
11.1.2 Malfunction and remedy
Malfunction
Remedy
Air inside the small
aspiration pipes of the
dosing pumps
n
Regulate the green roundy probe on its tube
lifting it up completely.
n
Lower it until at every pump pulse the probe
sensor symbol flashes.
Disconnected dosing
pump
n
Open the dosing pump vent and perform a
bleed phase (see chap. 9.2 „Bleed“ on page
23).
n
If the problem shall return check where the
air enters the system.
Dosing pump
membrane break
n
Replace the membrane.
n
Perform later a reagents calibration before
rebooting the machine (see chap. 9.3.1
„Manual calibration of the pumps“ on page
23).
Flow probe soiling
n
Dismount the probe (pay attention to the
float).
n
Unscrew the superior and inferior threaded
rings tube-holders, remove the float and
clean with compressed air or running water.
n
Reinsert the float and the stop in the sensor
holder.
n
Reassamble the probe. Perform a bleed
phase (see chap. 9.2 „Bleed“ on page
23).
Consumed probe
float. It occurs when
the operator put the
green coil in a too low
position and at the
same time the volume
dosed by the pump is
correct.
n
Substitute the float dismounting and moun-
ting the probe as explained in the previous
paragraph.
n
Perform a bleed phase (see chap. 9.2
„Bleed“ on page 23).
Tab. 13: Malfunction and remedy
Empty reagent tanks
Check the reason for the minimum level
switches placed in the tanks or in the water
tank to not activate.
Tab. 13: Malfunction and remedy
REMOTE SIGNALING: Closed contacts at 51 – 52 terminals
11.2 Empty reagents tanks
In the storage tanks there are mounted empty level switches. In cas of si-
gnal by one of these switches, after 10 seconds the production will block
and then the machine operation showing
Error Device
.
Pushing the
alarm
key, the operator will see the malfunction in detail.
The display will show which switch caused the production block.
è
To reset the anomaly and reboot the machine press
Enter
.
The release can occur only thanks to a level restoration; it means that
only when the level switch stops to signal the machine restart.
REMOTE SIGNALING: Closed contacts at 51 – 52 terminals
11.3 Analogic input anomaly
This alarm warns that an analogic input (its number is shown on the
alarm screen) shows an input value lower than 4 mA. This mean that the
contact could be interrupted. The involved inputs could be equally flowra-
te measure input, sensor inputs etc.
è
To reset the anomaly and reboot the machine press
Enter
.
Malfunction
Remedy
Signal wire interrupti-
on or anomaly of the
signal emitter
Damage restoration. Provisionally, the specific
input can be disabled setting the configurations
in the operation mode menu or in the sensor
menu.
Tab. 14: Malfunction and remedy
11.4 Gas detector pre-alarm
i
It is important to stress that air the room in case of gas in air is
necessary. Furthermore, if you need to operate on the machi-
ne wear the Personal Protective Equipment (PPE) as shown in
chap. 2.4 „Personal protective equipment“ on page 7.
If the gas detector sensor is present (see chap. „Gas detector sensor“ on
page 28), this alarm shows that the ClO
2
gas value in t air reached the
early-warning threshold. The pre-alarm does not block the production.
è
To reset the anomaly and reboot the machine press
Enter
.
