The Pump Does Not Start; The Pump Is Not Running, And The Indicator Light For Dry Running And Water Shortage Is On - Grundfos SCALA1 System Instructions Manual

6.2 The pump does not start

Grundfos Eye:
No lights are on.
Cause
The fuses in the
electrical installation
have blown.
The earth leakage
circuit breaker or the
voltage-operated circuit
breaker has tripped.
No power supply.
6.3 The pump does not start
Grundfos Eye:
Two opposite green
indicator lights are
permanently on.
Cause
The difference between
the SCALA1 unit and
the tapping point is
too large.
20
Remedy
• Replace the fuses if
they are blown.
• Check the electrical
installation.
1. Reset the circuit
breaker.
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.
Remedy
• 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
Dry running or water
shortage.
Impurities are blocking
the inlet pipe.
The foot or non-return
valve is blocked in a
closed position.
Leakage in the inlet
pipe.
Air in the inlet pipe or
the pump.
Remedy
• Check the water
source, and prime the
pump.
• Clean the inlet pipe.
• Clean, repair or
replace the foot or non-
return valve.
• Repair the inlet pipe.
• Prime the inlet pipe
and the pump. Check
the inlet conditions of
the pump.