Cause Remedy
The CIM module is defective. • Contact Grundfos.
Related information
2.2.5 Installing a communication interface module
8.20 Code 165 (Signal fault)
• Alarm code 165 is shown on the display.
• The alarm symbol on the display turns red and the pump stops.
• Alarm code Signal fault is displayed in Grundfos GO Remote.
Cause Remedy
The signal from the sensor is
out of the configured range.
• Go to Settings > Level
control in Grundfos GO
Remote and ensure that the
configured range corresponds
to the physical application
type.
• Change the sensor, if needed.
Related information
6.5.3.1 Setting the after-run delay, high level
8.21 Code 181 (Signal fault, PTC input)
• Alarm code 181 is shown on the display.
• The alarm symbol on the display turns red and the pump stops.
• Alarm code Signal fault, PTC input is displayed in Grundfos
GO Remote.
Cause
Remedy
There is a signal fault in the
PTC input.
• Make sure that the two PTC
wires from the pump are
connected correctly to the
terminals on the product.
• Make sure that the third PTC
wire is left unconnected, if
present.
• Make sure that the PTC wires
are undamaged.
• Make sure that the PTC
sensors within the pumps are
undamaged.
• Perform a test by
disconnecting the PTC wires
from the pump and shorting
PTC1 terminal A and B
and also PTC2 terminal A and
B, and verify that the error is
cleared.
• Replace the product due to
damaged PTC circuit. Contact
Grundfos.
Related information
2.3.3 Connecting the pump supply and power supply
8.13 Code 69 (Winding temperature too high)
8.22
Code 191 (High water level)
• Alarm code 191 is shown on the display.
• The alarm symbol on the display turns red, but the pump's
operating mode is unchanged.
• Alarm code High water level is displayed in Grundfos GO
Remote.
Cause
Remedy
The defined start level did not
start the pump.
• Check and configure the
sensor start level.
The pump is not big enough to
remove the water.
• Contact Grundfos or an
authorised service workshop.
Cause Remedy
The level sensor is defective
and not reacting on level
changes.
• Check the functionality of the
level sensor.
Related information
3.6 Configuring the IO terminals using Grundfos GO Remote
8.23 Code 205 (Level switch inconsistency)
• Alarm code 205 is shown on the display.
• The alarm symbol on the display turns red and the pump stops.
• Alarm code Level switch inconsistency is displayed in
Grundfos GO Remote.
Cause Remedy
A float switch could be
defective or stuck.
• Check the functionality of
each float switch.
Related information
3.6 Configuring the IO terminals using Grundfos GO Remote
6.5.3.1 Setting the after-run delay, high level
8.24 Code 220 (Contactor wear out)
• Warning code 220 is shown on the display if you press the Up
or Down button.
• Alarm code 220 is shown on the display.
• The alarm symbol on the display turns red and the pump stops.
• The warning symbol on the display turns yellow and the pump's
operating mode is unchanged.
• Alarm code or warning code Contactor wear out is displayed in
Grundfos GO Remote.
Cause
Remedy
Warning: The contactor is
almost worn out.
The controller is approaching
end-of-life and must be
replaced soon.
• Order a new LC 23X to avoid
downtime. Contact Grundfos.
Alarm: The contactor is worn
out and the pump cannot start.
The contactor has reached its
maximum number of operating
cycles and is worn out.
• Replace LC 23X. Contact
Grundfos.
Related information
6.15.4 Setting the motor protection with Grundfos GO Remote
8.25 Code 229 (Water on floor)
• Warning code 229 is shown on the display if you press
the Up or Down button.
• The warning symbol on the display turns yellow and the pump's
operating mode is unchanged.
• Warning code Water on floor is displayed in Grundfos GO
Remote.
Cause
Remedy
The sensor detects water on
the floor.
• Check for water leakage.
9. Technical data for LC 232
9.1 Electrical data
Voltage
• 1 x 110-240 V - 10 %/+ 10 %, PE
• 3 x 200-460 V - 10 %/+ 10 %, PE.
Frequency
50/60 Hz.
22
English (GB)
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