English (GB)
9
5. Fault finding
Faults in a CIM 1XX LON module can be detected by observing the status of the service LED (LED1) and
the LED for internal communication (LED2). See the table below.
CIM 1XX fitted in a Grundfos product
Fault (LED status)
Possible cause
Remedy
1.
The service LED (LED1)
remains off when the power
supply is connected.
a)
The CIM 1XX has not been
fitted correctly in the Grundfos
product.
Fit the CIM 1XX correctly in
the Grundfos product.
b)
No power supply to the
CIM 1XX.
Check the power supply to
the Grundfos product.
c)
The CIM 1XX is defective.
Replace the CIM 1XX.
2.
The service LED (LED1)
is permanently on.
a)
The CIM 1XX is defective.
Replace the CIM 1XX.
3.
The service LED (LED1)
flashes when the power
supply is connected to the
CIM 1XX, turns off, turns on
again and remains
permanently on.
a)
The CIM 1XX has no
application software
(application-less).
Try to download application
software via a LON installation tool
such as LonMaker.
b)
The CIM 1XX is defective.
Replace the CIM 1XX.
4.
The service LED (LED1)
flashes every second.
a)
The CIM 1XX has not been
installed.
Install the CIM 1XX by means of
a LON installation tool such as
LonMaker.
5.
The Grundfos product does
not react to changes of
settings, and the readout from
the LON network is incorrect.
The LED for internal
communication (LED2)
is permanently red.
a)
The CIM 1XX does not
support the Grundfos product
connected.
Contact the nearest Grundfos
company.
b)
The LON application may be
wrong, for instance CIM 110
software where CIM 100
software is required.
Download correct software via
a LON installation tool such as
LonMaker.
6.
The Grundfos product does
not react to changes of
settings, and the readout from
the LON network is incorrect.
The LED for internal
communication (LED2)
is flashing red.
a)
The cable between the
CIM 1XX and the Grundfos
product is connected
incorrectly or damaged.
Connect the cable correctly, or
replace the cable.
