The Pump Does Not Stop; The Pump Gives Electric Shocks; Twin Booster System Fault Finding; Fault Resetting - Grundfos SCALA1 Installation And Operating Instructions Manual

Cause
Grundfos Eye Indicator light Automatic reset Cause
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Cause
Grundfos Eye Indicator light Automatic reset Cause
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Cause
Pumps deliver different performances
Grundfos Eye Indicator light
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Only one pump is operating in the twin pump system
Grundfos Eye Indicator light Automatic reset Cause
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Cause
26
Remedy
The pump cannot deliver the necessary discharge
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pressure.
- The existing pipes are leaking or defective.
- The non-return valve is blocked or missing.
Remedy
- Defective earth connection.
Remedy
Automatic reset Cause
- Two different models of SCALA1 connected.
- Communication failure.
Remedy

15.8 The pump does not stop

Remedy
Replace the pump.
Repair the pipes.
Clean the valve or fit a non-return
valve.

15.9 The pump gives electric shocks

Remedy
Connect the earth connection to the pump according to local
regulations.

15.10 Twin booster system fault finding

In twin configuration, the same fault finding applies.
SCALA1 alarms act in the following way:
• Dry-run alarm: Pump alarm: stops one pump first and then the
other in case of dry-running.
• Max. runtime: System alarm: stops the entire system.
• Cycling protection: System alarm: stops the entire system.
Remedy
Check the system and each pump using the fault finding above.
Check or replace the twin communication cable.

15.11 Fault resetting

A fault indication can be reset in one of the 2 following ways:
1. Eliminate the fault cause and reset the pump manually by
pressing the [Reset] button.
2. Enable the Auto reset function.
Example:
If the fault disappears by itself, the pump will attempt to
reset automatically, and the fault indication will disappear.
The fault indication will still be visible in the Grundfos GO
Remote alarm log.
Remedy
Connect the same size models.