CAUTION
When the master menu is accessed, the communication with the slave units is interrupted and the
A13 No communication alarm is produced. Communication is automatically re-established by exiting
the Master Menu.
WARNING
In case of pumps in COMBO mode, it is recommended to make the connections to the motor
respecting the same phase sequence. In this manner, it will be ensured that by copying parameter
Rotation sense from the master unit to the slave units, all the pumps in the unit will maintain the
correct running direction.
11.2.5. Automatic master replacement
In COMBO mode, if a slave or the pump connected to it should fail or enter an alarm state, the unit will continue to
operate with the remaining units.
In case the master or the pump connected to it should break down or enter an alarm state, the unit will stop for
about 30 seconds generating the A13 No communication alarm in the slaves. After the waiting time has elapsed,
the slave with address 1 will become the master, thus allowing the unit to resume operation.
If the master reappears in the unit, the latter will stop again for about 30 seconds, generating the A12 Address error
alarm in the master and in the slave 1.
After the waiting time has elapsed, the master will assume address 0 and the slave address 1, thus allowing the
unit to resume operation.
CAUTION
In order to enable automatic master changeover, parameter Autorestart must be set to ON.
Do not touch the keypad of the devices during the master replacement process, otherwise the master
change process will be interrupted.
12. Alarms
WARNING
Immediate remedies must be implemented in case of alarms to safeguard the integrity of the device
itself and of the system in which it is installed.
Alarm
Description
Possible solutions
A01 Overcurrent motor
The current absorbed by the motor ex-
ceeds the maximum allowed value.
Reset mode:
• Automatic reset after 10 seconds for
up to 7 attempts, after which you
must wait for 60 minutes.
• Disconnecting the power supply.
• Check that motor parameters are correctly set.
• Check that the pump is turning in the correct direction.
• Make sure that the motor is free to rotate and check for any me-
chanical issues.
• Adjust parameter Voltage boost
A02 Sensor fault
The current value read by the analog
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.
SUND
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