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8. Fault finding the product
8.1 Grundfos Eye operating status
8.2 Fault finding
Reset a fault indication in one of the following ways:
• When you have eliminated the fault cause, the pump reverts to
normal duty.
• If the fault disappears by itself, the fault indication is
automatically reset.
Grundfos Eye Indication Cause
No lights are on.
The power is off.
The pump is not running.
Two opposite green indicator lights running in the
direction of rotation of the pump.
The power is on.
The pump is running.
Two opposite red indicator lights flashing
simultaneously.
Alarm.
The pump is stopped.
CAUTION
Pressurised system
Minor or moderate personal injury
- Before dismantling the pump, drain the system or
close the isolating valve on either side of the
pump. The pumped liquid may be scalding hot and
under high pressure.
WARNING
Electric shock
Death or serious personal injury.
- Switch off the power supply for at least 3 minutes
before you start any work on the product. Lock the
main switch in position 0. Type and requirements
as specified in EN 60204-1, 5.3.2.
WARNING
Electric shock
Death or serious personal injury.
- Make sure that other pumps or sources do not
force flow through the pump even if the pump is
stopped.
If the power supply cable is damaged, it must be
replaced by the manufacturer, the manufacturer's
service partner or a similarly qualified person.
Fault
Automatic reset
and restart?
Corrective actions
Other pumps or sources force flow through
the pump even if the pump is stopped. There
is light in the display even if the power
supply is switched off.
Yes
Check the system for defective non-return valves and replace the
valves, if necessary.
Check the system for correct position of non-return valves.
The supply voltage to the pump is too low. Yes Check that the power supply is within the specified range.
The pump is blocked. No
Dismantle the pump and remove any foreign matter or impurities
preventing the pump from rotating.
Check the water quality to eliminate the risk of lime precipitation.
No water at the pump inlet, or the water
contains too much air.
No
Prime and vent the pump before a new startup. Check that the
pump is operating correctly. If not, replace the pump, or contact
Grundfos Service.
Fault in the pump electronics. Yes Replace the pump, or contact Grundfos Service.
The supply voltage to the pump is too high. Yes Check that the power supply is within the specified range.
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