DAB ACTIVE DRIVER M/M 1.5 DUAL Instructions Pour L'installation Et La Maintenance page 32

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"LE" Block due to wrong voltage supply
"LP" / "HP" Block due to low
"bL" Block due to lack of water
"Block due to lack of water" (bL) even if there is no lack of water. So you should lower the set-
point pressure at a reasonable value that usually does not exceed 2/3 of the of the installed pump's head.
N o te: T h e A c tive D r iver system operates at a constant pressure. T h is regulation is appreciable if the
hydraulic system downstream is properly siz e d. Systems with too narrow pipes lead to a pressure
loss that the system cannot compensate. T h e result is that pressure is constant on the A c tive D r iver
device but not on the user.
"bP" Block due to disconnected pressure sensor
does not detect the presence of a pressure sensor the pump blocks and the "bP" error is
displayed. T h is error condition begins as soon as the problem is detected and it automatically ends 1 0 sec
after the correct conditions are restored.
oF/ot: Bl ock due to over current in the output stages at a temperature higher than 4 5 º C
"oF" and "ot" are alternatively displayed, w hen an over current in the output stages, with a temperature
higher than 4 5 ° C is detected. T h e pump can be restarted once the output stages are cold again. T h us the
single- phase pumps need a high voltage to be turned on, there are two protection steps that grant protection
both at the turn on moment and for the current working conditions.
Moreover the protection threshold for the restart decreases when the output stages temperature increases,
so that the pump will easily block for over current, when attempting to restart a single - phase pump with too
hot output stages.
"SC" Block due to direct short circuit between the phases of output
is equipped with a protection against short circuit that may occur among the "PUMP" output
terminal phases. W h en this block status is indicated, you should remove the short
the wiring integrity and the installation in general. O n ce these checks have been made you can try to recover
from the error simultaneously pressing and
seconds have elapsed from the moment in which the short circuit occurred.
W h eneve r a short circuit occurs, the event counter is increased and saved in the permanent memory
(E E P R O M ).
A F T E R T H E H U N D R E D T H SH O R T C I R C U I T T H E MA C H I N E BLO C K S PE R M A N E N T L Y
A N D I T W I L L N O LO N G E R BE PO S SI B LE T O UN B LO C K I T !
- circuit and carefully check
keys; anyway, this will have no effect until 1 0
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