Fault Finding The Product; Overview Of Alarm And Warning Codes; Code 2 (Power Phase Missing); Code 4 (Too Many Motor Restarts) - Grundfos CU 241 Instrucciones De Instalación Y Funcionamiento

9. Fault finding the product

WARNING
Electric shock
Death or serious personal injury
‐
Switch off the power supply before you start any work
on the product.
‐
Make sure that the power supply cannot be switched
on accidentally.
Fault finding and fault correction must be carried out by qualified
persons.

9.1 Overview of alarm and warning codes

Code number
Code 2
Code 4
Code 9
Code 12
Code 22
Code 25
Code 48
Code 57
Code 69
Code 84
Code 117
Code 157
Code 159
Code 165
Code 181
Code 191
Code 205
Code 225
Code 226
Code 229

9.2 Code 2 (Power phase missing)

• Alarm code 2 is shown on the display.
• The alarm symbol on the display turns red and the pump stops.
• Alarm code Power phase missing is displayed in Grundfos
GO Remote.
Cause
The product is configured for 2 or 3 phases but only 1 phase is
connected.
Remedy
• Make sure that the Mains Power connection setting is
correct according to the number of phases connected (1, 2 or
3 phases).
Cause
One of the power supply phases is not connected.
Remedy
• Connect the phase.
Cause
The fuse is blown somewhere on the incoming power line.
Description
The power phase is missing.
Too many motor restarts.
The power-phase sequence is
wrong.
Service is needed.
Moisture in motor of pump.
Wrong configuration.
The motor is overloaded.
Missing water in the application.
The winding temperature is too
high.
The memory-storage media is
faulty.
The door is opened.
Real-time clock monitoring.
Communication error, CIM xxx.
Signal fault.
Signal fault, PTC input.
High water level.
Level-switch inconsistency.
Communication error, pump
module.
Communication error, IO
module.
Water on the floor.
Remedy
• Replace the fuse.

9.3 Code 4 (Too many motor restarts)

• Alarm code 4 is shown on the display.
• The alarm symbol on the display turns red and the pump
stops.
• Alarm code Too many motor restarts is displayed in Grundfos
GO Remote.
Cause
The pump has been blocked or partly blocked causing overload in
the motor.
Remedy
• Remove the blockage from the pump.
Related information
6.13 Setting the maximum number of restarts with Grundfos GO
Remote

9.4 Code 9 (Power phase sequence wrong)

• Alarm code 9 is shown on the display.
• The alarm symbol on the display turns red and the pump
stops.
• Alarm code Power phase sequence wrong is displayed in
Grundfos GO Remote.
Cause
The power supply phase is set incorrectly.
Remedy
• Interchange two phases.

9.5 Code 12 (Service needed)

• Warning code 12 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 Service needed is displayed in Grundfos GO
Remote.
Cause
The pump requires service based on time to next service
countdown.
Remedy
• Contact Grundfos or an authorised service workshop.
• In order for the product to determine the service time, you
must have enabled the service countdown with Grundfos GO
Remote: Settings > Service

9.6 Code 22 (Moisture in motor of pump)

• Alarm code 22 is shown on the display.
• The alarm symbol on the display turns red and the pump
stops.
• Alarm code Moisture in motor of pump is displayed in
Grundfos GO Remote.
Cause
Moisture is detected in the motor of the pump.
Remedy
• Service is needed on the pump. Contact Grundfos.

9.7 Code 25 (Wrong configuration)

• Alarm code 25 is shown on the display.
• The alarm symbol on the display turns red and the pump
stops.
• Alarm code Wrong configuration is displayed in Grundfos GO
Remote.
Cause
The level control is not configured correctly.
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