The Pump Performance Is Insufficient; The Pump Starts And Stops Too Frequently - Grundfos SCALA1 Installation And Operating Instructions Manual

15.6 The pump performance is insufficient

Indicator
Grundfos Eye
light
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15.7 The pump starts and stops too
frequently
Indicator
Grundfos Eye
light
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32
Automatic
Cause
reset
Pump inlet pressure is too
-
low.
- Pump is undersized.
Inlet pipe, inlet strainer or
- pump are partially blocked by
impurities.
- Leakage in the inlet pipe.
Air in the inlet pipe or the
-
pump.
Automatic
Cause
reset
Leakage in suction pipe or
-
air in the water.
A tap has not been closed
-
entirely after use.
Minor leakage in the
-
system.
Remedy
Check pump inlet conditions.
Replace the pump with a
larger pump.
Clean the inlet pipe or the
pump.
Repair the inlet pipe.
Prime the inlet pipe and the
pump. Check pump inlet
conditions.
Remedy
Restore the water supply or
repair suction pipe.
Check that all taps have been
closed. See section Anti-
cycling.
Check the system for leakages.
See section Anti-cycling.