Alert Possible causes
Remedy
37)38)
Motor terminal board wired incorrectly
(delta/star)
Wire motor terminal board correctly.
Motor connection cable short circuit Check motor connection cable.
Sensor cable shielding connected incorrectly Connect sensor cable shielding to PE on one end
only.
24 V DC wiring short circuit Check wiring.
Mot therm Probe
Thermal overload
PTC sensor connected incorrectly Check PTC sensor connection.
Incorrect motor data set
(3-3-2
) Match motor data settings to motor used.
Wrong direction of rotation of the pump Change the direction of rotation of the motor via
the phase sequence.
Hydraulic overload Reduce the hydraulic load.
Pump blocked mechanically/runs sluggishly Check pump.
Motor terminal board wired incorrectly
(delta/star)
Wire motor terminal board correctly.
PumpDrive rating < motor rating or
Output current < motor current
Wrong device ordered; mount larger PumpDrive
model.
FI carrier frequency
(3-11-1-1)
set too high Set carrier frequency to permissible range
(⇨ Section 4.5 Page 15) .
Ambient temperature of PumpDrive > 40 °C Impermissible operating range; mind power
derating (⇨ Section 4.5 Page 15) .
Fluctuating DC link voltage
(1-4-1-1)
when
pump is not running
Check mains voltage quality.
Fluctuating DC link voltage
(1-4-1-1)
when
pump operates at rated values
Check mains voltage quality.
Incorrect motor current measurement
(1-2-1-5)
Measure current using suitable snap-on ammeter
and compare with
(1-2-1-5)
.
NOTE! 10 % tolerance is permissible.
Pump runs in reverse when motor is not
supplied with current
Check swing check valve.
PumpDrive output current set too low Slightly increase
(3-6-1-4)
to enable higher
PumpDrive output current.
Motor voltage output is too low at rated
load,
(1-2-1-3)
< 380 V at rated load
Check line input voltage; enter motor current at
380 V mains voltage; fit larger-sized motor.
Low 24 V DC voltage at the control terminals <
20 V DC
Check line input voltage with all consumers
being disconnected.
24 V DC voltage supply overload Reduce current input to 24 V DC, compare the
number of electrical connections with the
maximum permissible current load of the 24 V DC
supply (⇨ Section 4.5 Page 15) .
Short circuit of consumers connected to
24 V DC voltage supply
Disconnect defective 24 V DC consumers.
Control terminal wiring errors (DigIn, AnIn) Re-wire properly.
Drive over temp
PumpDrive
overtemperature
Ambient temperature of PumpDrive > 40 °C Impermissible operating range; mind power
derating (⇨ Section 4.5 Page 15) .
Ambient temperature of PumpDrive < 0 °C
Dirt in external fans Clean fans.
Heat sink/cooling fins dirty Clean heat sink/cooling fins.
FI carrier frequency
(3-11-1-1)
set too high Set carrier frequency to permissible range
(⇨ Section 4.5 Page 15) .
PumpDrive rating < motor rating or
Output current < motor current
Wrong device ordered; mount larger PumpDrive
model.
PumpDrive mounted incorrectly External fans must point upwards; on the wall-
mounted model, the back of the heat sink must
be closed.
Under Voltage Line input voltage too low Check the mains voltage.
Fluctuating DC link voltage
(1-4-1-1)
when
pump is not running
Check mains voltage quality.
37)
Disconnect PumpDrive from the power supply to rectify faults on current-carrying components. Observe the safety
information!
38)
Restore the PumpDrive default settings.
11 Trouble-shooting
PumpDrive
135 of 162
To Next Page
Loading...
