Fault Finding - Grundfos IO 111 Manual De Instrucciones

12. Fault finding

Warning
Before any fault finding, make sure that the fuses have been removed or the mains switch
has been switched off. It must be ensured that the power supply cannot be accidentally
switched on.
Fault
The indicator light on the IO 111
is flashing at start-up. This
indicates configuration warning.
The indicator light on the IO 111
is on. This indicates general
warning (only IO 111 with
communication module).
The indicator light on the IO 111
is flashing after correction of
fault. This indicates
configuration warning (only
IO 111 with communication
module).
Green indicator light (pos. 12) is
not on when the pump is
running.
New oil does not show 4 mA on
analog output 1.
Yellow indicator light for stator
insulation resistance is on during
installation.
The water-in-oil sensor
previously indicated water in the
oil, but now it indicates less than
5 % water in the oil.
Temperature alarm is indicated
but the pump is not hot.
The SM 111 cannot detect the
sensor.*
* Only for non-Ex applications with DIP switch 10 in position off.
18
Cause
The DIP switch setting is
incorrect.
The connection between the
IO 111 and SM 111 is
interrupted, or the setting of DIP
switches 1 and 2 (pos. 11) is
incorrect.
The connection between the
IO 111 and SM 111 is
interrupted, or the setting of DIP
switches 1 and 2 (pos. 11) is
incorrect.
Conductor for contactor status
has not been connected to
terminals K1 and K2 (pos. 2).
The oil in the oil chamber has
not been changed completely, or
it was changed to another type.
The warning limit for stator
insulation resistance is too low.
The power supply to the IO 111
has been interrupted.
ATEX/IECEx protection is
activated, and one of the
additional alarms is shown.
Fault in signal from sensor.
Remedy
Set the DIP switch, see 6.3.
Re-establish the connection or
reconfigure the DIP switch 1
and 2 (pos.11).
Re-establish the connection or
reconfigure the DIP switch 1
and 2 (pos.11).
Connect the conductor.
Calibrate the IO 111 to the
new oil, see 9. Calibration.
Set a higher limit on the
potentiometer, see 6.1.
Let the pump run for some
time and check again.
Check connection to the
SM 111.
Re-establish the signal, e.g.
by changing the setting of DIP
switch 9 or by securing the
wire connection from sensor
to SM 111.