Install Instructions

15.2 The pump does not start
Grundfos Eye Indicator light
Automatic
reset
Cause Remedy
- -
The fuses in the electrical installation have
blown.
Replace the fuses. If the new fuses blow as
well, check the electrical installation.
- -
The earth leakage circuit breaker or the
voltage-operated circuit breaker has been
tripped.
Cut in the circuit breaker.
- - No power supply. Contact the power supply authorities.
- -
The difference between SCALA1 unit and
the tapping point is too large.
Adjust the installation or select a SCALA1
unit with a higher head.
Cause Remedy
15.3 The pump is not running
Grundfos Eye Indicator light
Automatic
reset
Cause Remedy
- - Power supply failure.
Switch on the power supply. Check the cables
and cable connections for defects and loose
connections. Check for blown fuses in the
electrical installation.
Yes
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.
No Maximum runtime has been exceeded.
Check the installation for leakage and reset the
alarm.
Yes
The internal non-return valve is defective or
blocked in completely or partially open
position.
Small leakage is detected by the anti-
cycling function. Alarm is on.
Clean, repair or replace the non-return valve.
Check the taps and reconsider the usage
pattern, e.g. ice machines, water evaporators
for air-conditioning, etc.
- No
The shaft seal is seized up.
The pump is blocked by impurities.
See section 10. Starting up the product after
the standstill.
No No
Overheating due to seized-up or choked-up
pump.
Contact your pump supplier.
No No Too low or too high supply voltage.
Check the supply voltage and correct the fault,
if possible.
No -
The pump has been stopped by external
input or calendar function.
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English (GB)