Schneider Altivar 28 Manual De Usario página 94

Faults - Causes - Remedies
Faults which can be reset with the automatic restart function, after the
cause has disappeared (continued)
Fault Probable cause
- - - - O O O O P P P P F F F F - loss of a phase at the speed con-
motor phase troller output
failure - downstream contactor open
- motor not connected or motor
power too low
- instantaneous instability in the
motor current
- - - - S S S S L L L L F F F F - incorrect connection on the speed
serial link failure controller connector
- disconnection of communication
in local control mode
Malfunction with no fault display
Display
no code, LED not - no power supply
illuminated
- - - - r r r r d d d d Y Y Y Y - an LI input is assigned to
"freewheel stop" or "fast stop"
red LED illuminated
and this input is not switched on.
These stops are controlled by
loss of the input
- - - - r r r r d d d d Y Y Y Y or n n n n S S S S t t t t - high inertia or driving load
non-following of
deceleration ramp
95
Probable cause
Remedy
- Check the connections from the speed controller to
the motor
- If a downstream contactor is being used, set OPL to
OAC
- Test on a low power motor or without a motor: In
factory settings mode, motor phase loss detection is
active (OPL = YES) To check the drive in a test or
maintenance environment without having to switch to a
motor with the same rating as the drive (particularly
useful in the case of high power drives), deactivate
motor phase loss detection (OPL = no)
- Optimize the drive settings via Ith, UnS, UFr and auto-
tuning
- Check the serial link connection on the speed control-
ler connector
- Restore the connection
Remedy
- Check power supply to drive
- Connect the input to 24 V to disable the stop
- Reset dEC and FLG