English (GB)
16
One yellow indicator light rotating in
the direction of rotation of the motor
when seen from the non-drive end.
Replace motor bearings (30)
1. The bearings must be replaced. a) Follow the instructions for the pump.
See section 7.12 Replacing the bearings.
Internal sensor fault (88)
1. The pump is receiving a signal from
the internal sensor which is outside
the normal range.
a) Check that the plug and cable are connected
correctly to the sensor. The sensor is on the
back of the pump housing.
b) Replace the sensor.
Pt100/1000 sensor 1 (91) and 2 (175)
1. Pt100/1000 input 1 is receiving a
signal which is outside the normal
range.
a) Check that the sensor resistance corresponds to
≈ 100 or 1000 ohm. If not, replace the sensor.
b) Check the sensor cable for damage.
c) Check the cable connection at the pump and at
the sensor. Correct the connection, if required.
d) Replace the sensor.
Supply fault, 5 V (161)
1. Fault in the output voltage to sensor or
potentiometer.
a) Check the output voltage and wire to sensor or
potentiometer.
Supply fault, 24 V (162)
1. Fault in the output voltage. a) Check the output voltage and wire.
Signal fault, LiqTec-sensor (164)
1. The pump is receiving a signal from
the LiqTec sensor which is outside the
normal range.
a) Check that the plug and cable are connected
correctly to the sensor.
b) Replace the sensor.
Signal fault, sensor 1 (165), 2 (166) and 3 (167)
1. Analog input 1, 2 or 3 is receiving a
signal which is outside the normal
range.
a) Check the setup of the analog input corresponds
to the sensor output as regards electrical
(0.5 - 3.5 V, 0-5 V, 0-10 V, 0-20 mA or 4-20 mA).
If not, change the setting, or replace the sensor
with one that matches the setup.
b) Check the sensor cable for damage.
c) Check the cable connection at the pump and at
the sensor. Correct the connection, if required.
d) Check if the sensor has been removed, but the
input was not deactivated.
e) Replace the sensor.
Limit 1 exceeded (190) and limit 2 exceeded (191)
1. Limit 1 or 2 has reached the limit for
warning/alarm.
a) Identify and remove the fault cause.
Grundfos Eye Condition/cause Remedy
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