DP Pumps Hydro-Unit Utility Line F, Инструкция по установке и эксплуатации

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9.2 Trouble-shooting: frequency inverter
WARNING
Improper work to remedy faults
Risk of injury!
Ø For any work performed to remedy faults, observe the relevant information
given in this operating manual and/or in the product literature provided by
the accessories manufacturer.
If problems occur that are not described in the following table, consultation with the DP
service is required.
A
Mains fuse rating too small for the nominal mains current.
B
Motor does not start.
C
Motor running unevenly.
D
Max. speed not reached.
E
Motor running at maximum speed only.
F
Motor running at minimum speed only.
G
No/faulty 24 V supply.
H
Wrong direction of rotation of the motor.
I
Fault message/protective tripping.
Table 22: Trouble-shooting
A B C D E F G H I Possible cause Remedy
- ✘ - - - - ✘ - - No voltage Check the mains voltage; check the mains fuses.
- ✘ - - - - - - - No enable Check enable via DIGIN-EN and system start.
✘ - - - - - - - - Mains fuse rating too small for
frequency inverter input current Check configuration/selection of mains fuse.
- - - ✘ - - - - - No setpoint signal or setpoint set
too low / drive overloaded and in
i
2
t control mode
Check setpoint signal and operating point.
- - - - ✘ - - - - Process-related persistent
control deviation (actual value
smaller than setpoint) or no
actual value (e.g. due to broken
wire) Check setpoint signal/actual value signal. Check
operating point. Check controller setting.
- ✘ -
-
- - - - - ✘ Permissible voltage range
undershot/exceeded
Check mains voltage; supply frequency inverter with
required voltage.
- - - - - - - ✘ - Wrong direction of rotation
setting Change the direction of rotation.
- - ✘ ✘ - - - - ✘ Frequency inverter overloaded Reduce the power input by lowering the speed; check the
motor/pump for blockages.
- ✘ - - - - - - ✘ Short circuit in control cable/
pump blocked
Check/replace control cable connections. Remove the
blockage manually.
- - ✘ ✘ - - - - ✘ Temperature of power
electronics or stator winding too
high
Reduce the ambient temperature.
– Improve ventilation.
– Clean cooling fins.
– Ensure that the intake opening for the fans is not
blocked.
– Ensure that the fans are working properly.
– Reduce the power input by changing the operating
point (system-specific).
– Check the permissible load and, if necessary, use
external cooling.