DDPHCL2_man_r1.0 – 03/2021
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ERRORS / ALARMS
Every error or anomaly detected by the system generates an alarm message on the display:
LEV1
/
LEV2
The level sensor 1 or 2 detected a low level of the liquid to be dosed;
restore the level into the related tank
FLOW
The flow sensor detected an anomaly that can be due to low pressure
into the hydraulic circuit or wrong adjustment of the flow sensor; restore
the flow or adjust the sensor
STOP
This message indicates that the pumps have been manually de-activated
by pressing the ON/OFF button
UR / OR
Under/Over Range: measurement out of range; this signal can be
generated by a dead or broken electrode, or by a damaged or
disconnected cable; check the system and restore correct measurement
conditions
AL.1
/
AL.2
Dosing time alarm for pump 1 or 2: measurement is outside the set-point
for a time longer than the set limit, due to an insufficient dosage or a
wrong configuration of the alarm time (see parameters P11 and P12);
set the parameters properly
Calibration Impossible
Check the status of electrode and connection cable; check that the
calibration solutions are not expired or contaminated; repeat the
procedure
MAINTENANCE
The periodic maintenance operations are essential for the proper functioning of the system and its
duration in time. The below advices should be strictly followed.
Before any operation, make sure the system is unplugged!
Dosing Pumps
Weekly operations:
-
Check the level of the solution to be dosed to prevent the pump from running dry
-
Check that the suction and head pipes are clean and not containing any impurities
-
Check that the filter is not clogged to avoid the decreasing of flow rate
Operations every three months
(or in case of pump drifting):
-
Clean all the parts that come into contact with the chemical (pump body, foot filter and injection
valve). If the pump doses additives that from crystals, clean more frequently.
Proceed as follows:
o
Dip the suction tube and the foot filer into clean water
o
Start the pump and leave it run for a few minutes to let the water wash the pump head
If there are crystals to remove, proceed as follows:
o
First use a proper chemical (instead of water) to dissolve the crystals (e.g. hydrochloric acid
for sodium hypochlorite crystals) and let the pump work for a few minutes
o
Repeat the procedure with clean water
Once the cleaning is done, connect again the pump to the plant and resume normal operations.
