Warnings - Grundfos ALPHA Installation And Operating Instructions Manual

12.8.2 Code 40 (Undervoltage)
Grundfos mini Eye is flashing red, the displays show error code E2
and the pump stops.
Cause
The supply voltage to the pump
is too low.
12.8.3 Code 29 (Forced pumping)
Grundfos mini Eye is flashing red, the displays show error code E3
and the pump stops.
Cause
Other pumps or sources
generate flow through the
pump even if the pump is
switched off.
12.8.4 Code 74 (Overvoltage)
Grundfos mini Eye is flashing red, the displays show error code E3
and the pump stops.
Cause
The supply voltage to the pump
is too high.
12.8.5 Code 72 (Internal fault)
Grundfos mini Eye is flashing red, the displays show error code E3
and the pump stops.
Cause
Internal fault.
12.8.6 Code 76 (Internal fault)
Grundfos mini Eye is flashing red, the displays show error code E3
and the pump stops.
Cause
Internal fault.
12.8.7 Code 85 (Internal fault)
Grundfos mini Eye is flashing red, the displays show error code E3
and the pump stops.
Cause
Internal fault.
22
Remedy
• Make sure that the power
supply is within the specified
range.
Remedy
• 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.
Remedy
• Make sure that the power
supply is within the specified
range.
Remedy
• Replace the pump and
dispose in an environmentally
sound way according to local
regulations, or contact
Grundfos Service.
Remedy
• Replace the pump and
dispose in an environmentally
sound way according to local
regulations, or contact
Grundfos Service.
Remedy
• 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
Water is missing in the system
or the system pressure is too
low.
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
Other pumps or sources
generate flow through the
pump even if the pump is
switched off.
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
There is air in the pump and/or
system.
Remedy
• Fill the system with the correct
amount of liquid.
• Prime and vent the pump
before a new startup.
Remedy
• 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.
Remedy
• Vent the pump and system.
• If the problem persists,
investigate the system for
leakages.