ENGLISH
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13.4 oF/ot: Blockage due to current overload in the output stages with temperature of the stages higher
than 45°C
The letters “oF” and “ot” are shown alternately on the display, indicating that a current higher than the safety
threshold has been detected in the output stages and that the temperature of the stages is higher than 45°C.
This means that it might be possible to restart the electropump once the stages have cooled down. The
operating principle of this protection is as follows: since single-stage pumps are characterised by a high
starting current, to make it possible to protect the stages both at starting and during normal operation, 2
different protection thresholds have been introduced.
Moreover, the protection threshold for starting decreases as the temperature of the output stages increases, so
that it will be easier to have a blockage for current overload when trying to start a single-phase pump when
the stages are too warm.
13.5 SC : Blockage due to direct short circuit between the phases of the output terminal
The ACTIVE DRIVER is equipped with protection against the direct short circuit which may occur
between the phases U, V, W of the “PUMP” output terminal. When this block status is indicated, you
are advised to eliminate the short circuit and to check the wiring carefully to ensure it is unbroken and
the installation in general. Once these checks have been made you can try to reset operation by
simultaneously pressing the
+
and – keys;
anyway, this will have no effect until 10 seconds have
passed from the moment in which the short circuit occurred.
Whenever a short circuit occurs, an event counter is increased and saved in the permanent memory
(EEPROM).
AFTER THE HUNDREDTH SHORT CIRCUIT THE MACHINE BLOCKS PERMANENTLY
AND IT WILL NO LONGER BE POSSIBLE TO UNBLOCK IT!
13.6 MANUAL RESET of error condition
In error status the operator can reset the error by forcing a new attempt, pressing the
+
and
–
keys
simultaneously.
13.7 Self-reset of error conditions
For some malfunctions and block conditions, the system makes attempts at automatic reset of the
electropump.
The following table shows the sequences of the operations performed by the ACTIVE DRIVER for the
different types of blockage.
Automatic resets of error conditions
Display indication
Description
Sequence of automatic reset
bL
Blockage due to water lack
- An attempt every 10 minutes for a total of 6 attempts
- An attempt every 1 hour for a total of 24 attempts
- An attempt every 24 hours for a total of 30 attempts
bP
Blockage due to fault of the
pressure sensor
- Reset 10 seconds after correct conditions return
LP
Blockage due to low supply
voltage
- Reset when voltage returns to a value in the range
220V - 20% + 10%
HP
Blockage due to high
voltage
- Reset when the internal voltage returns in acceptable
conditions
Ot
Blockage due to overheating
of the power stages
- Reset when the temperature of the power stages falls
below 70°C again
OC
Blockage due to current
overload
- An attempt every 10 minutes for a total of 6 attempts
oF
Blockage due to current
overload in the output
stages
- An attempt every 10 minutes for a total of 6 attempts
oF/ot
Blockage due to current
overload in the output
stages with temperature of
the stages higher than 45°C
- An attempt every 10 minutes or when the temperature
has fallen by 10°C. The counting of the attempts is
shared with that of the blockage oF.
