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8. Fault finding
Various faults of the CIM module can be detected by
observing the status of the three communication
LEDs.
8.1 LED1 and LED2 remain off when the
power supply is connected
Cause
The CIM module is fitted
incorrectly in the
Grundfos product.
The CIM module is
defective.
If the CIM module is
fitted in a CIU 90xbox:
Related information
3.6 LEDs
8.2 LED2 for internal communication is
flashing red
Cause
There is no internal
communication between
the CIM module and the
Grundfos product.
If the CIM module is
fitted into a CIU 90x
box:
Related information
3.6 LEDs
14
Remedy
•
Make sure that the
CIM module is fitted
correctly in the
Grundfos product.
•
Replace the CIM
module. Contact
Grundfos.
•
Check the power
supply for the CIU 90x
box.
Remedy
•
Make sure that the
CIM module is fitted
correctly in the
Grundfos product.
•
Make sure that the
GENIbus cable to the
product and possible
wires are connected
properly on clamps A-
Y-B (and are not
mixed).
8.3 LED2 for internal communication is
permanently red
Cause
The CIM module does
not support the
Grundfos product.
The CIM module is not
configured. The product
driver is not downloaded
from the cloud yet.
When the CIM
module is switched on,
LED2 may turn green
for 1 minute before it
turns permanently red.
Related information
3.6 LEDs
8.4 LED1 is flashing yellow
LED1 is flashing with a one-second interval.
Cause
The SIM card is not
inserted.
The SIM card is
not inserted correctly.
The PIN code of the
SIM card is not removed
or set to 4321.
No connection to the
cellular network.
Related information
3.6 LEDs
Remedy
•
Contact Grundfos.
•
Run the setup process
in the cloud. Contact
Grundfos.
Remedy
•
Insert the SIM card.
•
Insert the SIM card
correctly.
•
Remove the PIN
code or set it to 4321
with a mobile phone.
•
Check the connection
to the antenna.
•
Check the cellular
coverage of the area
with, for instance, a
mobile phone.
•
Experiment with the
position of the external
antenna.
•
In some cases, adding
an additional antenna
to the second SMA
connector may
improve the signal.
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