Troubleshooting On Initial Installation; Table 13: Troubleshooting - DAB MCE-22/P Handbuch

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.
The display shows 4) Entry of setpoint too high for pump.
5) Inverted direction of rotation.
BL
6) Incorrect setting of pump current
7) Maximum frequency too low (*).
The display shows
1) Pressure sensor disconnected.
2) Pressure sensor faulty.
BP1
1) Excessive absorption.
The display shows
2) Pump blocked.
3) Pump absorbs high current on start-
OF
1) Incorrect pump current setting (RC).
The display shows 2) Excessive absorption.
3) Pump blocked.
OC
4) Inverted direction of rotation.
The display shows 1) Low power supply voltage
2) Excessive voltage drop on line
LP
Regulation
FL setting too high
pressure greater
than SP
The display shows
Short circuit between phases
SC
1) Minimum flow threshold FT setting
The pump never
2) Short observation time(*).
stops
3) Unstable pressure regulation(*).
4) Incompatible use (*).
The pump stops
1)Short observation time(*).
2) Minimum frequency FL setting too
even when not
required
The multi inverter
One or more inverters have an
system does not
incorrect RC current setting.
start
The display shows:
One or more inverters have sensitive
parameters not aligned
Press + to align this
config
(*) The asterisk refers to cases of systems without the flow sensor

Table 13: Troubleshooting

Possible causes
RC(*).
up.
too low.
high (*).
ENGLISH
Set parameter RC (see section
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) Set a correct value for pump current RC(*) (see
7) If possible, increase FS or lower RC(*) (see
1) Check the pressure sensor cable connection.
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
1) Set RC with the current according to the type of connection
(star or delta) as stated on the motor dataplate (see
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
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) Wait for ½ day for self-learning process (*) or implement quick
learning process (see
3) Correct GI and GP(*) (see
4) Ensure that the system meets the operating requirements
without the flow sensor (*) (see section
by pressing MODE SET + - to recalculate conditions without the
flow sensor.
1) Wait for ½ day for self-learning process (*) or implement quick
learning process (see section
2) If possible set a lower FL value(*).
Check the RC current setting on each inverter.
Press + on the inverter that has the most recent and correct
configuration of parameters.
84
Remedy
6.5.1
).
6.5.2
).
6.5.1
6.6.6
6.6.11
6.5.2
).
6.5.9.1.1
)
6.6.4 6.6.5
and )
6.5.9.1
). Attempt to reset
6.5.9.1.1
).
).
).
).
6.5.1
)