33
English
WILO SE
10 Faults, Causes and Remedies
WARNING! Risk of electric shock!
Danger from electrical current must be eliminated.
Before carrying out any electrical work, the pump and accessory must be
de-energised and protected against unauthorised restarting.
WARNING! Risk of scalding!
If the water temperature and system pressure are high, close the gate valves
upstream and downstream from the pump. As a first step, allow the pump to cool
down.
Faults Causes Remedies
The pump will not stop Loss of water of more than
3 l/min on the pipework
Service the system, taps, toilets, etc.
Printed circuit board fault Printed circuit board fault:
replace the PCB
Incorrect electrical connection Check the connections against the
diagrams in Fig. 5 and 6
Pump incorrectly adjusted Adjust the duty point of the pump so
that it is not operating too close to
the reset and stop conditions set by
the automatic control system,
i.e. 1.5 bar and 95 l/h
The control system is not
suitable for this type of pump
The pump will not start The pump was not primed with
water
The protection against dry running
has been triggered in and the FAILURE
LED has lit up: prime the pipe by
emptying the water from the system
and turning on a tap at the level of
the HiControl 1 to reduce the pres-
sure in the water column beneath,
and check by pressing manually the
RESET button.
Insufficient water The safety system has been activated
ans the FAILURE indicator light has
turned on. Check the power supply
and start the pump using the manual
RESET button
Pump blocked FAILURE indicator light on. Theî™ safety
system was activated. When the
RESET button is pressed, the ON
indicator light turns on, but the pump
doesn't start. Contact technical
support
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