Grundfos ALPHA2 GO - Code 76 (Internal Fault); Code 85 (Internal Fault); Code 132 (Corrupted or Missing GSC File); Code 25 (Incorrect PWM Configuration)

11.10 Code 76 (Internal fault)
The warning and alarm symbol flashes red, the display shows error
code E3 and the pump stops.
Cause Remedy
Internal fault. • Replace the pump or contact
Grundfos.
11.11 Code 85 (Internal fault)
The warning and alarm symbol flashes red, the display shows error
code E3 and the pump stops.
Cause Remedy
Internal fault. • Replace the pump or contact
Grundfos.
11.12 Code 132 (Corrupted or missing GSC file)
The warning and alarm symbol flashes red, the display shows error
code E3 and the pump stops.
Cause Remedy
The GSC file has been
corrupted or is missing.
• Reconnect with Grundfos GO
and repeat the configuration.
11.13 Code 25 (Incorrect PWM configuration)
The warning and alarm symbol flashes yellow, and the pump
continues to run.
Cause Remedy
The pump is receiving a
signal via the PWM input,
but the PWM configuration is
missing or not finished.
• Ensure the pump is set to
externally controlled (PWM
mode).
• Finalise the PWM
configuration via the Settings
menu.
If the pump is to be used as
a replacement pump, replicate
the configuration of the pump
to be replaced via the GO
Replace tool.
Related information
8.7.1 Replacing a UPM3 or UPM4 pump
11.14 Code 43 (Forced pumping)
The warning and alarm symbol is permanently yellow, the display
shows error code E3 and the pump is running.
Cause Remedy
Other pumps or sources create
a flow through the pump.
• Check the system for correct
position of the non-return
valves.
• Check the system for
defective non-return valves,
and replace the valves if
necessary.
11.15 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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