Protection Systems; Description Of Blockages; "Bl" Anti Dry-Run (Protection Against Dry Running); Anti-Cycling (Protection Against Continuous Cycles Without Utility Request) - DAB E.SYBOX MINI 3 Instructions Pour L'installation Et L'entretien

6 - PROTECTION SYSTEMS

The device is equipped with protection systems to preserve the pump, the motor, the sup-
ply line and the inverter. If one or more protections trip, the one with the highest priority is
immediately notified on the display. Depending on the type of error the motor may stop, but
when normal conditions are restored the error status may be cancelled immediately or only
after a certain time, following an automatic reset.
In the case of blockage due to water lack (BL), blockage due to motor overload (OC), block-
age due to direct short circuit between the motor phases (SC), you can try to exit the error
conditions manually by simultaneously pressing and releasing the ˄ and ˅ keys. If the error
condition remains, you must take steps to eliminate the cause of the fault.
In the event of blocking due to one of the internal errors E18, E19, E20, E21 it is necessary
to wait 15 minutes with the machine powered until the blocked status is automatically reset.
Alarm in the fault log
Display indication
PD
FA
Blockage conditions
Display indication
PH
BL
BP1 Blockage due to reading error on the delivery pressure sensor
BP2 Blockage due to reading error on the suction pressure sensor
PB Blockage due to supply voltage outside specifications
LP
HP
Description
Irregular switching off
Problems in the cooling system
Table 7: Alarms
Description
Cutout due to pump overheating
Blockage due to water lack
Block for low DC voltage
Block for high DC voltage
OT Blockage due to overheating of the power stages
OC
SC Blockage due to short circuit between the motor phases
ESC
HL
NC
Ei
Vi Blockage due to i-th internal voltage out of tolerance
EY Block for cyclicality abnormal detected on the system
Table 8: Indications of blockages

6.1 - Description of blockages

6.1.1 - "BL" Anti Dry-Run (Protection against dry running)

In the case of lack of water the pump is stopped automatically after the time TB. This is
indicated by the red "Alarm" led and by the letters "BL" on the display. After having restored
the correct flow of water you can try to leave the protective block manually by pressing the
"˄" and "˅" keys simultaneously and then releasing them. If the alarm status remains, or
if the user does not intervene by restoring the flow of water and resetting the pump, the
automatic restart will try to restart the pump.
If the parameter SP is not correctly set, the protection against water lack may
not work correctly.

6.1.2 - Anti-Cycling (Protection against continuous cycles without utility request)

If there are leaks in the delivery section of the plant, the system starts and stops cyclically
even if no water is intentionally being drawn: even just a slight leak (a few ml) can cause a
fall in pressure which in turn starts the electropump.
The electronic control of the system is able to detect the presence of the leak, based on
its recurrence.
The Anti-Cycling function can be excluded or activated in Basic or Smart mode (par 5.6.6).
In Basic mode, once the condition of recurrence is detected the pump stops and remains
Blockage due to motor overload
Blockage due to short circuit to earth
Hot liquid
Blockage due to motor disconnected
Blockage due to i-th internal error
GB
ENGLISH
60