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14.2 CIU 262
You can detect faults in CIU 262 by observing the status of the
two communication LEDs. See the table below and section
.
14.2.1 LED status
Fault (LED status)
Possible cause
Remedy
1. LED1 and LED2 remain off when the
power supply is connected.
a) CIM 260 is fitted incorrectly in the
Grundfos product.
Ensure that CIM 260 is fitted and connected
correctly.
b) CIM 260 is defective.
Replace CIM 260.
2. LED2 for internal communication is
flashing red.
a) No internal communication between CIM
260 and the Grundfos product.
Ensure that CIM 260 is fitted correctly in the
Grundfos product.
3. LED2 for internal communication is
permanently red.
a) CIM 260 does not support the Grundfos
product connected.
Contact the nearest Grundfos company.
4. LED1 for cellular communication is
flashing yellow. See signal 1 in fig.
a) The SIM card has not been inserted.
Insert the SIM card.
See section
b) The SIM card has not been inserted
correctly.
Insert the SIM card.
See section
c) The SIM card PIN code is not correct.
Enter the correct PIN code.
See section
d) No connection to the cellular network.
• Check the connection to the antenna.
• Check the cellular coverage of the area
using for example a mobile phone.
• Use an external antenna and experiment
with the position.
5. LED1 for cellular communication is
pulsating yellow with single pulse, but
CIM 260 cannot send or receive SMS
messages.
a) CIM 260 has not been initialised.
Follow the configuration procedure in "CIM
260 SMS commands" which you can
download from Grundfos Product Center..
