Alarm Notification
LED
Description Possible solutions
LINE<-
>MOT
INV.
Red STAND-BY
led flashing very
quickly.
Reverse the connection of the pow-
er cable and motor cable.
• Correct the connection of the power and motor cables.
A01
Overcur-
rent mo-
tor
2 flashes of the
yellow alarm led
The current absorbed by the motor
exceeds the value set in the param-
eter Rated motor current.
Reset mode:
• Automatic reset after 10 seconds
for up to 7 attempts, after which
you must wait for 60 minutes.
• Disconnecting the power supply.
• Verify that the value set for the parameter Rated motor current
corresponds at least to the rated current of the motor according
to its rating plate data.
NOTE
The voltage drop across the inverter (varia-
ble between 20 and 40 VAC) causes the
motor to be powered at a slightly lower volt-
age than the one stated on the data plate.
The current absorbed by the motor could
therefore be slightly higher than the rated
current indicated in data plate and, to obtain
maximum performance, it is necessary to in-
crease the parameter Rated motor current
between 5% and 10%.
WARNING
Check with the motor manufacturer the toler-
ability to withstand a current greater than its
rated current.
• Check that all the motor phases are correctly connected and
that the connection is suitably configured in Star or Delta.
• Check that motor parameters are correctly set.
• In devices with FOC control, perform a new motor calibration.
• In the presence of output filters (dV / dt or sinusoidal), check
that they are correctly connected and, in devices with FOC
control, check that you have correctly set the parameters PWM
and FOC dynamics in relation to the length of the motor cable
and the type of filter used.
• Check that the pump is turning in the correct direction.
• Make sure that the motor is free to rotate and check for any
mechanical issues.
• Adjust parameter Voltage boost
A02 Sen-
sor fault
3 flashes of the
yellow alarm led
The current value read by the ana-
log input is less than 4 mA.
Reset mode:
• Alarm reset by STOP key.
• Disconnecting the power supply
• Check that the connections on the device side and on the
sensor side are correct.
• Check that the sensor is fed the correct power.
• Check that the sensor is working properly.
• If only one sensor is connected to analog input 1, try to connect
it to analog input 2.
A03 Over
tempera-
ture in-
verter
4 flashes of the
yellow alarm led
The temperature reached by the de-
vice is higher than the maximum al-
lowed value.
Reset mode:
• Automatic reset
• Check that the ambient temperature is within the allowed limits.
• Make sure the device is protected from direct exposure to sun-
light or heat sources.
• Check that both the external and internal cooling fans (if
present) are working properly.
• Check that the dissipation channels are clean.
• Check that the device is cooled as indicated in the dedicated
chapter.
• Reduce parameter PWM as much as possible.
NOTE
To ensure uninterrupted operation, the inverter
automatically reduces the maximum frequen-
cy (i.e. power) when the internal temperature
reaches a certain threshold. If such frequen-
cy reduction is not sufficient to keep the tem-
perature above the maximum permitted value,
the inverter will stop the motor and trigger the
alarm A03 Over temperature inverter.
A04 Dry
run co-
sphi
1 flash of the yel-
low alarm led
The warning W26 No water ap-
peared 5 consecutive times follow-
ing the automatic reset attempts.
Reset mode:
• Alarm reset by STOP key.
• Disconnecting the power supply
WARNING
When the warning W26 No water appears, the
device will automatically restart the load after
a time equal to the value set in the parame-
ter Restarts delay multiplied by the number
of attempts made. At the end of the fifth at-
tempt, the device will definitively stop the load
producing the alarm A04 Dry run cosphi. The
alarm must be reset manually.
MIDA
48
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