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 Description
Code 2 The power phase is missing.
Code 4 Too many motor restarts.
Code 9 The power-phase sequence is wrong.
Code 12 Service is needed.
Code 22 Moisture in motor of pump.
Code 25 Wrong configuration.
Code 48 The motor is overloaded.
Code 57 Missing water in the application.
Code 69 The winding temperature is too high.
Code 84 The memory-storage media is faulty.
Code 117 The door is opened.
Code 159 Communication error CIMxxx.
Code 165 Signal fault.
Code 191 High water level.
Code 205 Level-switch inconsistency.
Code 225 Communication error pump module.
Code 226 Communication error IO module.
Code 229 Water on the floor.
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
One of the power supply phases is not connected.
Remedy • Connect the phase.
Cause The fuse is blown somewhere on the incoming power line.
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.
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