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mode and it is possible to press (1) to
run the pump.
• Alarms A3, A5, A6, A7, A8, A9 are
available in MANUAL mode and
when an alarm is triggered, the LED
(8) is illuminated and the pump can-
not be started by pressing (1).
• Alarm A2: if the system is in manual
mode and (1) has been pressed to
run the pump, the pump stops and
the LED (8) is illuminated when the
absorbed current exceeds the set val-
ue.
6.1.1 List of alarms
N°
Text on
Model
the dis-
play (*)
A1
WATER
MMW
LACK
MTW
MMA
MTA
Causes:
1. No flow of water on the intake side of the pump.
The pump must not run dry because this causes
severe damages.
2. For the MMW and MTW the EL parameter is
enabled and the digital input is open. See
SIC MENU (MB) parameters
3. For the MMA and MTA the EXT.LOW WATER
parameter is enabled and the digital input is
open. See
Advanced menu (ME) parameters
(page 36)
AUTOMATIC mode: Alarm triggered and pump
locked. It is possible to run the pump in manual
mode (2) when the alarm is triggered: press (6),
make sure the LED (8) is off, and press (1). The
pump can be run and primed in this way, but it is im-
portant not to run it on dry for more than 5 seconds.
Solutions:
• Check the working order of the level sensor
(float, minimum pressure switch, optional probe
module panel).
• Check for the presence (level) of water on the in-
take side.
• Check the water pressure on the intake side.
N°
Text on
Model
the dis-
play (*)
A2
OVER
MMW
CURR
MTW
MMA
MTA
Descrip-
Reset
tion
No flow
Automat-
of water
ic, when
to the
the alarm
pump.
stops
BA-
(page 34)
Descrip-
Reset
tion
Overcur-
Automat-
rent on
ic. A max
the mo-
of 4 at-
tor side
tempts to
of the
start are
electric
made at
pump.
2 second
intervals.
Perma-
nent
locking
of the
electric
N°
Text on
Model
the dis-
play (*)
Troubleshooting: The converter supplies current to
the electric motor above the set rated value. The
converter protects the motor against current over-
load.
Solutions:
• Check the condition of the windings of the elec-
tric motor.
• Check the power consumption of the electric mo-
tor.
• Check the cross-section of the motor's power ca-
ble: this must be suited to the length of the cable
and to the power of the motor.
• Check configuration of the rated current parame-
ter.
• The value of the converter's rated current must
be at least equal to the current value on the data
plate. If the power cable for the motor is longer
than 30 meters, it is advisable to increase the
value by a minimum of 10%.
– para. A models MMW and MTW. See
MENU (MB) parameters
– para. NOM.CURR for models MMA and MTA.
See
BASIC MENU (MB) parameters
34).
WARNING:
If the value is not configured correctly,
the motor might NOT be protected
against overload and could suffer irrepar-
able damage.
N°
Text on
Model
the dis-
play (*)
A3
MOTOR
MMW
DIS
MTW
MMA
MTA
An automatic function of the converter that detects
current consumption while the motor is running. The
converter cuts out the power supply to the motor and
remains locked.
Troubleshooting:
• In the case of single-phase motors, the thermal
circuit breaker (motor protector) trips automati-
cally. The circuit breaker is located in the terminal
box, a separate electrical panel or in the motor,
depending on the model of the electric pump (re-
fer to the relative manual).
• Breaking or failure of a phase of the motor.
• Failure/disconnection/deterioration of a phase of
the motor's power cable.
en - Original instructions
Descrip-
Reset
tion
pump if
the alarm
contin-
ues to be
active af-
ter these
attempts.
BASIC
(page 34).
(page
Descrip-
Reset
tion
Electric
Manual.
motor
discon-
nected
39
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