DAB MCE-55/P - Troubleshooting on Initial Installation; Table 12: Troubleshooting

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5.2 Troubleshooting on initial installation
Fault Possible causes Remedy
The display shows
EC
Pump current (RC) not set
Set parameter RC (see section
6.5.1).
The display shows
BL
1) No water.
2
) Pump not primed.
3) Flow sensor disconnected.
4
) Entry of setpoint too high for pump.
5) Inverted direction of rotation.
6) Incorrect setting of pump current
RC(*).
7) Maximum frequency too low (*).
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).
The display shows
BP1
1) Pressure sensor disconnected.
2) Pressure sensor faulty.
1) Check the pressure sensor cable connection.
2) Replace the pressure sensor.
The display shows
OF
1) Excessive absorption.
2
) Pump blocked.
3) Pump absorbs high current on start-
up.
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).
The display shows
OC
1) Incorrect pump current setting (RC).
2
) Excessive absorption.
3) Pump blocked.
4
) Inverted direction of rotation.
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.
3) Check the direction of rotation (see
6.5.2).
The display shows
LP
1) Low power supply voltage
2
) Excessive voltage drop on line
1) Ensure presence of correct line voltage.
2) Check the power cable section
(see section 2.2.1).
Regulation
pressure greater
than SP
FL setting too high
Reduce minimum operating frequency FL (if electric pump
enables this)
The display shows
SC
Short circuit between phases
Ensure that the motor is in the correct condition and check
connections to the latter
The pump never
stops
1) Minimum flow threshold FT setting
too low.
2
) Short observation time(*).
3) Unstable pressure regulation(*).
4
) Incompatible use (*).
1) Set a higher FT threshold
2) Wait for ½ day for self-learning process (*) or implement quick
learning process (see
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.
The pump stops
even when not
required
1)Short observation time(*).
2
) Minimum frequency FL setting too
high (*).
1) Wait for ½ day for self-learning process (*) or implement quick
learning process (see section
6.5.9.1.1).
2) If possible set a lower FL value(*).
The multi inverter
system does not
start
One or more inverters have an
incorrect RC current setting.
Check the RC current setting on each inverter.
The display shows:
Press + to align this
config
One or more inverters have sensitive
parameters not aligned
Press + on the inverter that has the most recent and correct
configuration of parameters.
(*) The asterisk refers to cases of systems without the flow sensor
Table 12: Troubleshooting