Nastec SUND, Инструкция по установке, использованию и техническому обслуживанию

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Alarm Description Possible solutions
A03 Over temperature
inverter The temperature reached by the device
is higher than the maximum allowed
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 sunlight
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 chap-
ter.
NOTE
To ensure uninterrupted operation, the inverter au-
tomatically reduces the maximum frequency (i.e.
power) when the internal temperature reaches a
certain threshold. If such frequency reduction is
not sufficient to keep the temperature above the
maximum permitted value, the inverter will stop the
motor and trigger the alarm A03 Over temperature
inverter.
A04 Dry run cosphi The warning W26 No water appeared
5 consecutive times following the auto-
matic reset attempts.
Reset mode:
• Alarm reset by STOP key.
• Disconnecting the power supply
WARNING
When the warning W26 No water appears, the de-
vice will automatically restart the load after a time
equal to the value set in the parameter Restarts
delay multiplied by the number of attempts made.
At the end of the fifth attempt, the device will defini-
tively stop the load producing the alarm A04 Dry run
cosphi. The alarm must be reset manually.
A05 Under voltage • Supply voltage below the minimum
allowed value.
• Insufficient input power to power the
device.
Reset mode:
• Automatic reset if parameter Autores-
tart = ON
• Check the value of the power supply voltage both under no load and
load conditions.
• Verify that the source has enough power to power the load.
A06 Over voltage The power supply voltage or the volt-
age inside the device exceeds the max-
imum allowed value.
Reset mode:
• Automatic reset if parameter Autores-
tart = ON
• Check the value of the power supply voltage both under no load and
load conditions.
• Check for regeneration from the load.
• Increase parameter Ramp down
• Increase parameter Ramp freq. min motor
• In the case of a permanent magnet motor, check that the load is not
subjected to passive movement.
A07 Max value alarm The value read by the analog input is
higher than the value set for the param-
eter Max alarm value.
Reset mode:
• Automatic reset
• Check the value set for the parameter.
• Check the hydraulic causes that lead to the alarm condition.
• Check that the sensor is working properly.
A08 Locked rotor The automatic frequency limitation cre-
ated by the inverter following an exces-
sive absorption by the motor (beyond
the value set in the parameter Rated
motor current) causes a reduction of
the frequency below the average value
between Min motor frequency and Max
motor frequency.
Reset mode:
• Alarm reset by STOP key.
• Disconnecting the power supply
• Check the possible solutions for the alarm A01 Overcurrent motor
A09 Overload inverter The current absorbed by the load ex-
ceeds the rated current of the device.
Reset mode:
• Alarm reset by STOP key.
• Disconnecting the power supply
• Make sure that the motor is free to rotate and check for any me-
chanical issues.
• Increase the value of the parameter Ramp up time.
• Increase the value of the parameter Ramp freq. min motor.
• Adjust parameter Voltage boost
• Check the value of the power supply voltage both under no load and
load conditions.
SUND
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