LED Description Color Indication
Constant red The alarm condition is
present. The alarm is
acknowledged, or no
acknowledgement is
required.
– There is no alarm.
ALARM B Alarm, Class B Flashing red The alarm is not
acknowledged. The
alarm condition is either
present or has ceased.
Constant red The alarm condition is
present. The alarm is
acknowledged, or no
acknowledgement is
required.
– There is no alarm.
RUN Mixer/pump running Green The mixer/pump is
operating.
– The mixer/pump is not
operating.
COMMS Mixer/pump
communication
Green The mixer/pump
communication is
established.
– No mixer/pump
communication is
established.
RS-485 Modbus RTU
communication
Green Modbus RTU
communication
– No Modbus RTU
communication
Table 2: Fault indications
ALARM A ALARM B RUN COMMS RS-485 Indication
Flashing red – – – Flashing green The unit is
defective.
Contact the
local sales and
service
representative.
Flashing red Flashing red Flashing
orange
Flashing green Flashing green Software fault.
Restart the unit.
6 Operation
22 APP 412 Installation, Operation, and Maintenance manual
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