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