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5.2
Troubleshooting on initial installation
Fault
The display shows
Pump current (RC) not set
EC
1) No water.
2) Pump not primed.
3) Flow sensor disconnected.
4) Entry of setpoint too high for pump.
5) Inverted direction of rotation.
The display shows
6) Incorrect setting of pump current RC(*).
BL
7) Maximum frequency too low (*).
8) SO parameter not set
9) MP minimum pressure parameter
The display shows
BPx
1) Excessive absorption.
The display shows
2) Pump blocked.
OF
3) Pump absorbs high current on start-up.
1) Incorrect pump current setting (RC).
The display shows
2) Excessive absorption.
OC
3) Pump blocked.
4) Inverted direction of rotation.
The display shows
1) Low power supply voltage
LP
2) Excessive voltage drop on line
Regulation pressure
FL setting too high
greater than SP
The display shows
Short circuit between phases
SC
1) Minimum flow threshold FT setting too low.
2) Short observation time(*).
The pump never stops
3) Unstable pressure regulation(*).
4) Incompatible use (*).
1)Short observation time(*).
The pump stops even
2) Minimum frequency FL setting too high (*).
when not required
3) Excessively high setting of minimum
The multi inverter
One or more inverters have an incorrect RC
system does not start
The display shows:
Press + to align this
config
In a multiple inverter
system the parametres
are not propagatable
Possible causes
correctly
not set correctly
1) Pressure sensor disconnected.
2) Pressure sensor faulty.
shutdown frequency FZ (*).
current setting.
One or more inverters have sensitive
parameters not aligned
1) Different passwords
2) Presence of non-propagatable
configurations
(*) The asterisk refers to cases of systems without the flow sensor
ENGLISH
Set parameter RC (see section 6.5.1).
1-2) Prime the pump ad ensure that there is no air in the pipelines. Check that intake or any
filters are not obstructed Check that the pipeline from the pump to the inverter is not damaged
or leaking.
3) Check the connections to the flow sensor.
4) Lower the setpoint or use a pump suited to system requirements.
5) Check the direction of rotation (see 6.5.2).
6) Set a correct value for pump current RC(*) (see 6.5.1).
7) If possible, increase FS or lower RC(*) (see 6.6.6).
8) set SO value correctly (see para. 6.5.14)
9) set MP value correctly (see para. 6.5.15
1) Check the pressure sensor cable connection.
BP1 refers to the sensor connected to Press 1, BP2 to press2,
BP3 to current sensor connected to J5
2) Replace the pressure sensor.
1) Check type of connection; star or delta. Check that the motor does not absorb current over
the max. admissible value for inverter. Check that the motor has all phases connected.
2) Check that the impeller or motor is not blocked or obstructed by foreign bodies. Check motor
phase connections
3) Reduce the acceleration parameter AC (see 6.6.11).
1) Set RC with the current according to the type of connection (star or delta) as stated on the
motor dataplate (see 6.5.1)
2) Check that the motor has all phases connected.
3) Check that the impeller or motor is not blocked or obstructed by foreign bodies.
4) Check the direction of rotation (see 6.5.2).
1) Ensure presence of correct line voltage.
2) Check the power cable section
(see section 2.2.1).
Reduce minimum operating frequency FL (if electric pump enables this)
Ensure that the motor is in the correct condition and check connections to the latter
1) Set a higher FT threshold
2) Set a higher FZ threshold
3) Wait for the self-learning process (*) or run quick learning mode (see para 6.5.9.1.1)
3) Correct GI and GP(*) (see 6.6.4 and 6.6.5)
4) Ensure that the system meets the operating requirements without the flow sensor (*) (see
section 6.5.9.1). Attempt to reset by pressing MODE SET + - to recalculate conditions without
the flow sensor.
1) Wait for the self-learning process (*) or run quick learning mode (see para 6.5.9.1.1).
2) If possible set a lower FL value(*).
3) Enter a lower threshold for FZ.
Check the RC current setting on each inverter.
Press + on the inverter that has the most recent and correct configuration of parameters.
1) access each inverter individually and enter the same password on all, or remove the
password. See para. 6.6.16
2) modify the configuration so that it is propagatable; it is not admitted to propagate
configurations with FI=0 or FZ=0. See paragraph 4.2.2.2
Table 16: Troubleshooting
99
Remedy
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