Remove the cover of the processing unit
and check the status of the LEDs.
Power supply:
Does green LED 8 light up?
Overheating:
Does red LED 6 not light up?
Function:
Does green LED 7 flash (1/s)?
Data reception RX:
Does red LED 4 flash?
Data transmission TX:
Does green LED 3 flash?
1. Contact the manufacturer.
1. Check the power supply (12-24 VDC).
Temperature exceeds 105 °C:
1. Install the flowmeter away from the delivery line
at a cooler point.
Processing unit malfunction:
1. Contact the manufacturer.
No data reception from the processing unit:
1. Check the cabling.
2. Ensure that the Modbus master is transmitting.
Processing unit does not respond:
1. Check the Modbus address.
2. Check the cabling.
3. Check the terminating resistor (120 Ω).
4. Check the transmission rate (baud rate).
NO
NO
NO
NO
NO
YES
YES
YES
YES
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