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Translation from original instructions
7.6 Alarms and malfunctions
Possible malfunctions will trigger the protective devices and safety devices of the unit before serious faults occur.
All the “warnings” and “alarms” are recorded in the memory of the control and displayed on the display of the unit.
Before resetting an alarm, the cause that triggered it must be found and eliminated.
An alarm going off repeatedly quickly leads to serious damage to the unit.
Refer to the manual of the control for the alarms and warnings that appear on the display of the unit.
In case of anomalies not handled by the control panel, refer to the following troubleshooting section.
This troubleshooting section does not include causes due to deliberate work or tampering or particularly serious malfun-
ctions, for which a thorough analysis is necessary.
7.6.1 General troubleshooting
SYMPTOM
LIKELY CAUSE
POSSIBLE SOLUTION
The unit does not start, the display is
off.
No mains voltage.
Check that the main disconnect switch
is in the “ON” position.
Check for voltage in the power supply
line.
No voltage to the auxiliary circuit.
Check that the protective devices upli-
ne and downline of the transformer of
the auxiliary circuit are undamaged.
Reset the triggered protective device
after eliminating the cause that trigge-
red it
The unit does not start, the display is
off, the control is powered correctly.
The unit is switched off from the di
-
splay and the display is disconnected
or not working.
Restore the connection of the display
or replace it.
The unit does not start, the display is
off, the control is powered correctly but
the LEDs are not flashing.
The control is not working.
Replace the control.
The unit is operating normally, the
display is off.
The connection of the display to the
control is disconnected.
Restore the connection between the
display and the control.
The display is not working.
Replace the display.
The unit does not start, the display is
on.
There is no 230V auxiliary power
supply.
Check that the secondary circuit of the
230V transformer is intact.
Check that the protective devices
downline of the 230V transformer are
intact.
Check that the phase sequence is
correct and that the phase sequence
relay is intact.
Abnormal noises from the unit due to
vibrations.
The weight of the unit is not distributed
evenly on the base.
Correct the weight distribution of the
unit by adjusting the height of the an-
ti-vibration mounts.
Abnormal noises on the hydraulic
pipes.
Operation of the system pump outside
its performance curve with excessive
water flow rate.
If it is not possible to work on the
control of the pump, partially close the
shut-off device on the delivery side of
the unit until the nominal flow rate is
restored.
Presence of air in the system.
Check that the air valves are not shut
off by valves.
Vent the system.
