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10
5.5 LEDs
CIM 200 Modbus module has two LEDs. See fig.
• Red and green status LED1 for Modbus communication
• Red and green status LED2 for internal communication
between CIM 200 and the Grundfos product.
LED1
LED2
Status
Description
Off
No Modbus communication.
Flashing green
Modbus communication active.
Flashing red
Fault in the Modbus communication.
Permanently red
Fault in the CIM 200 Modbus
configuration.
Status
Description
Off
CIM 200 has been switched off.
Flashing red
No internal communication between CIM
200 and the CIU 202 unit.
Permanently red
CIM 200 does not support the Grundfos
product connected.
Permanently green
Internal communication between CIM 200
and the CIU 202 unit is OK.
During startup, there may be a delay of up to 5
seconds before the LED2 status is updated.
