Code 163 (Motor-Drive Protection Function Measurement Fault); Code 165 (Signal Fault); Code 181 (Signal Fault, Ptc Input); Code 191 (High Water Level) - Grundfos LC 231 Installation And Operating Instructions Manual

• The CIM module is unable to communicate with the product.
Cause
The CIM module is installed incorrectly.
Remedy
• Ensure that the module, including cables, is fitted correctly.
Cause
The CIM module is defective.
Remedy
• Contact Grundfos.
Related information
2.2.5 Installing a communication interface module
8.21 Code 163 (Motor-drive protection function
measurement fault)
• Alarm code 163 is shown on the display.
• The alarm symbol on the display turns red, but the pump's
operating mode is unchanged.
• Alarm code Motor drive protection function measurement
fault is displayed in Grundfos GO Remote.
Grundfos GO
Input
Remote menu
3 phases without
3 Phase neutral (L3
connected to N)
3 Phase with 3 phases with
neutral neutral
2 phases with
2 phase L1-L2-N
neutral
1 phase with
1 Phase L1-N
neutral
Cause
The measured current is above the limit.
Remedy
• Make sure that the Mains Power connection setting in
Grundfos GO Remote is configured correctly according to
input connections.
• Make sure that the Mains Power connection setting in
Grundfos GO Remote is configured correctly according to
pump connections.
• Make sure that the pump is connected to the correct
contactor terminals (T1, T2, T3) depending on the
configuration in Mains Power connection.
• Remove load from non-configured contactor terminals (T2,
T3) depending on the configuration in Mains Power
connection.

8.22 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
The signal from the sensor is out of the configured range.
Remedy
• 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
6.6.1 Setting the after-run delay, high level
Output
3-phase pumps connected
to T1-T2-T3.
3-phase pumps connected
to T1-T2-T3.
2-phase pumps: P1
connected to T1-N. P2
connected to T2-N.
1-phase pumps: P1
connected to T1-N. P2
connected to T1-N.

8.23 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
There is a signal fault in the PTC input.
Remedy
• 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

8.24 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
The defined start level did not start the pump.
Remedy
• Check and configure the sensor start level.
Cause
The pump is not big enough to remove the water.
Remedy
• Contact Grundfos or an authorised service workshop.
Cause
The level sensor is defective and not reacting on level changes.
Remedy
• Check the functionality of the level sensor.
Related information
3.6 Configuring the IO terminals using Grundfos GO Remote

8.25 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
A float switch could be defective or stuck.
Remedy
• Check the functionality of each float switch.
Related information
3.6 Configuring the IO terminals using Grundfos GO Remote
6.6.1 Setting the after-run delay, high level

8.26 Code 220 (Contactor wear out)

• Warning code 220 is shown on the display if you press
the Up or Down button.
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