6.2 The pump does not start
Grundfos Eye:
No lights are on.
Cause Remedy
The fuses in the
electrical installation
have blown.
• Replace the fuses if
they are blown.
• Check the electrical
installation.
The earth leakage
circuit breaker or the
voltage-operated circuit
breaker has tripped.
1. Reset the circuit
breaker.
No power supply. 1. Switch on the power
supply.
2. Check for blown fuses
in the electrical
installation.
3. Check the cables and
cable connections for
defects and loose
connections.
4. Contact the power
supply authorities.
6.3 The pump does not start
Grundfos Eye:
Two opposite green
indicator lights are
permanently on.
Cause Remedy
The difference between
the SCALA1 unit and
the tapping point is
too large.
• Adjust the installation
or select a SCALA1
unit with a higher head.
6.4 The pump is not running, and the
indicator light for dry running and water
shortage is on
Grundfos Eye:
Two opposite red
indicator lights are
flashing simultaneously.
The indicator light for dry
running and water
shortage is on.
Cause Remedy
Dry running or water
shortage.
• Check the water
source, and prime the
pump.
Impurities are blocking
the inlet pipe.
• Clean the inlet pipe.
The foot or non-return
valve is blocked in a
closed position.
• Clean, repair or
replace the foot or non-
return valve.
Leakage in the inlet
pipe.
• Repair the inlet pipe.
Air in the inlet pipe or
the pump.
• Prime the inlet pipe
and the pump. Check
the inlet conditions of
the pump.
20
English (GB)
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