Grundfos ALPHA - Code 57 (Dry Running)

12.8.2 Code 40 (Undervoltage)
Grundfos mini Eye is flashing red, the displays show error code E2
and the pump stops.
Cause Remedy
The supply voltage to the pump
is too low.
• Make sure that the power
supply is within the specified
range.
12.8.3 Code 29 (Forced pumping)
Grundfos mini Eye is flashing red, the displays show error code E3
and the pump stops.
Cause Remedy
Other pumps or sources
generate flow through the
pump even if the pump is
switched off.
• Switch off the pump at the
main switch. If the light in the
pump display is on, the pump
is running in forced pumping
mode.
• Check the system for the
correct position of the non-
return valves.
• Check the system for
defective non-return valves
and replace the valves if
necessary.
12.8.4 Code 74 (Overvoltage)
Grundfos mini Eye is flashing red, the displays show error code E3
and the pump stops.
Cause
Remedy
The supply voltage to the pump
is too high.
• Make sure that the power
supply is within the specified
range.
12.8.5 Code 72 (Internal fault)
Grundfos mini Eye is flashing red, the displays show error code E3
and the pump stops.
Cause
Remedy
Internal fault. • Replace the pump and
dispose in an environmentally
sound way according to local
regulations, or contact
Grundfos Service.
12.8.6 Code 76 (Internal fault)
Grundfos mini Eye is flashing red, the displays show error code E3
and the pump stops.
Cause
Remedy
Internal fault. • Replace the pump and
dispose in an environmentally
sound way according to local
regulations, or contact
Grundfos Service.
12.8.7 Code 85 (Internal fault)
Grundfos mini Eye is flashing red, the displays show error code E3
and the pump stops.
Cause
Remedy
Internal fault. • Replace the pump and
dispose in an environmentally
sound way according to local
regulations, or contact
Grundfos Service.
12.8.8 Code 57 (Dry running)
Grundfos mini Eye is flashing red, the displays show error code E4
and the pump stops.
Cause Remedy
Water is missing in the system
or the system pressure is too
low.
• Fill the system with the correct
amount of liquid.
• Prime and vent the pump
before a new startup.
Related information
8.2 Dry-running protection
12.9 Warnings
12.9.1 Code 43 (Impellers forced forward)
One indicator light in Grundfos mini Eye is yellow and rotating, the
display shows error code E3 and the pump is running.
Cause Remedy
Other pumps or sources
generate flow through the
pump even if the pump is
switched off.
• Switch off the pump at the
main switch. If the light in the
pump display is on, the pump
is running in forced pumping
mode.
• Check the system for the
correct position of the non-
return valves.
• Check the system for
defective non-return valves
and replace the valves if
necessary.
12.9.2 Code 35 (Air in media)
This is not shown on the operating panel. It is logged and can be
seen in Grundfos GO.
Cause
Remedy
There is air in the pump and/or
system.
• Vent the pump and system.
• If the problem persists,
investigate the system for
leakages.
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