Grundfos Eye
Indicator
light
Automatic
reset
Cause Remedy
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.
15.4 The pump is running
Grundfos Eye Indicator light
Automatic
reset
Cause Remedy
No
The non-return valve is not
properly closed, or the pipe
system is leaking. This
happens when cycling alarm
and/or leakage alarm are
disabled.
Check and repair the pipe
system, or clean, repair or
replace the non-return valve.
No
Small continuous
consumption.
Check the taps and reconsider
the usage pattern (ice
machines, water evaporators
for air-conditioning, etc.).
29
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