LED bar
Status
First LED flashing
Motor in operation; the speed is lower than the absolute
minimum, P27
Off
Motor stopped
6.4.4 COM (communication)
Condition 1
• The communication bus protocol is the Modbus RTU protocol; the P50 parameter is
set to the Modbus value
• No optional communication module is used.
LED
Status
Off
The unit cannot detect any valid Modbus messages on
the terminals provided for the communication bus
Green steady
The unit has detected a communication bus on the
provided terminals and has recognized the correct
addressing.
Green flashing
The unit has detected a communication bus on the
provided terminals and has not been addressed correctly
From green steady to off
The unit has not detected a valid Modbus RTU message
for at least 5 seconds.
From green steady to flashing
The unit has not been addressed correctly for at least 5
seconds.
Condition 2
• The communication bus protocol is the BACnet MS/TP protocol; the P50 parameter is
set to the BACnet value
• No optional communication module is used.
LED
Status
Off
The unit has received no valid requests from other
BACnet MS/TP devices for at least 5 seconds.
On steady
The unit is exchanging information with another BACnet
MS/TP device.
Condition 3
• A multi-pump control mode is selected (e.g. MSE or MSY)
• No optional communication module is used.
LED
Status
Off
The unit has received no valid requests from other pumps
through the multi-pump BUS for at least 5 seconds
On steady
The unit is exchanging information with another pump
through the multi-pump BUS.
Condition 4
The optional communication module is being used.
LED
Status
Off
RS485 or wireless connection faulty or missing.
Flashing
The unit is exchanging information with the
communication module.
6 System Setup and Operation
26
Smart Pump Range INSTRUCTION MANUAL
