Product Manual

CU331SP variable frequency drive
SQ, SQE, CU 331, and SP
10
41
Operating hours
The value of operating hours is an accumulated value
calculated from the pump's startup date and cannot be
reset. No additional sensor is required.
Measured value
Sensor display will show the actual pressure as
received from the pressure transducer.
Speed
Display will show the motor speed in RPM's
(calculated).
Input power
Display will show the power consumption in kW.
Motor current
Display will show the actual motor current being used.
Logging functions
Alarm and warning log
The latest five alarms and five warnings are logged
with a timestamp corresponding to the power-on time
after the fault has occurred. The alarm and warning log
can be shown directly on the display.
See section Warning and alarm list on page 48.
Signal relays
The table shows the function of the signal relays.
See also fig. 27.
Fig. 27 Terminals for signal relays (normal state, not
activated)
CU331SP installation
Mechanical installation
The individual CU331SP cabinet sizes are
characterized by their enclosures. The table in section
CU331SP technical data on page 49 shows the
relationship of enclosure class and enclosure type.
Reception and storage
Check on receipt that the packaging is intact, and the
unit is complete. In case of damage during transport,
contact the transport company to file a claim.
Note that the CU331SP is delivered in a packaging
which is not suitable for outdoor storage.
Transportation and unpacking
The CU331SP must only be unpacked at the
installation site to prevent damage during the transport
to the site.
The packaging contains accessory bag(s),
documentation and the unit itself. See fig. 28.
Fig. 28 CU331SP packaging
Type Function
Relay 1 • Pump running
Relay 2 • Alarm
TM03 8801 3407
Terminal Function
C1 C2 Common
NO 1 NO 2 Normally open contact
NC1 NC2 Normally closed contact
TM05 5990 4012
Accessory bag