Install Instructions

Cause Remedy
15.7 The pump starts and stops too frequently
Grundfos Eye Indicator light Automatic reset Cause Remedy
- -
Leakage in suction pipe or air in the
water.
Restore the water supply or repair suction pipe.
- -
A tap has not been closed entirely after
use.
Check that all taps have been closed. See
section Anti-cycling.
- - Minor leakage in the system.
Check the system for leakages.
See section Anti-cycling.
Cause Remedy
15.8 The pump does not stop
Grundfos Eye Indicator light Automatic reset Cause Remedy
- -
The pump cannot deliver the necessary discharge
pressure.
Replace the pump.
- - The existing pipes are leaking or defective. Repair the pipes.
- - The non-return valve is blocked or missing.
Clean the valve or fit a non-return
valve.
Cause Remedy
15.9 The pump gives electric shocks
Grundfos Eye Indicator light Automatic reset Cause Remedy
- - - Defective earth connection.
Connect the earth connection to the pump according to local
regulations.
Cause Remedy
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.
Pumps deliver different performances
Grundfos Eye Indicator light Automatic reset Cause Remedy
- - Two different models of SCALA1 connected. Connect the same size models.
Only one pump is operating in the twin pump system
Grundfos Eye Indicator light Automatic reset Cause Remedy
- - Communication failure.
Check the system and each pump using the fault finding above.
Check or replace the twin communication cable.
Cause Remedy
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:
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English (GB)