Nidec Digistart D3 User Manual

96 Digistart D3: User Guide
Issue: G
Symptom
Probable Cause
Remote start/stop command is
overriding Auto Start/Stop settings
when using remote two-wire control.
•
Auto Start/Stop should only be used in remote mode with three-wire or
four-wire control.
The soft starter does not control the
motor correctly during starting.
• Start performance may be unstable when using a low Motor Full Load
Current setting (Pr 1A).
•
Power factor correction (PFC) capacitors must be installed on the supply
side of the soft starter and must be disconnected during starting and
stopping. To control a dedicated PFC capacitor contactor, connect the
contactor to run relay terminals.
Motor does not reach full speed.
•
If the start current is too low, the motor will not produce enough torque to
accelerate to full speed. The soft starter may trip on excess start time.
NOTE
Make sure the motor starting parameters are appropriate for the
application and that you are using the intended motor starting
profile. If a programmable input is set to Motor Set Select,
check that the corresponding input is in the expected state.
The load may be jammed. Check the load for severe overloading or a locked
rotor situation.
Erratic motor operation.
•
The SCRs in the Digistart D3 require at least 5 A of current to latch. If
you are testing the soft starter on a motor with full load current less than
5 A, the SCRs may not latch correctly.
Erratic and noisy motor operation.
• If the soft starter is connected to the motor using inside delta
configuration, the soft starter may not be correctly detecting the
connection. Contact your local supplier for advice.
Soft stop ends too quickly.
•
The soft stop settings may not be appropriate for the motor and load.
Review the soft stop settings.
•
If the motor is very lightly loaded, soft stop will have limited effect.
Adaptive Control, brake, jog and
PowerThrough functions not working.
•
These features are only available with in-line installation. If the Digistart
D3 is installed inside delta, these features will not operate.
After selecting Adaptive Control the
motor used an ordinary start and/or
the second start was different to the
first.
•
The first Adaptive Control start is actually 'Constant Current' so that the
starter can learn from the motor characteristics. Subsequent starts use
Adaptive Control.
PowerThrough does not operate
when selected.
•
The starter will trip on Lx-Tx Shorted on the first start attempt after
control power is applied. PowerThrough will not operate if control power
is cycled between starts.
Starter "awaiting data"
• The keypad is not receiving data from the control PCB. Check the cable
connection and the fitting of the display on the starter.
Corrupted text shown on keypad
display.
•
The keypad may not be screwed down, resulting in an intermittent
connection. Screw down the keypad or hold squarely in place.
Display is distorted
• Check that the keypad has not been screwed down too tightly. Loosen
screws slightly.
Parameter settings cannot be stored.
•
Make sure you are saving the new value by pressing the M button after
adjusting a parameter setting. If you press , the change will not be
saved.
• Check that the adjustment lock (Pr 15C) is set to Read & Write. If the
adjustment lock is set to Read Only, settings can be viewed but not
changed. You need to know the security access code to change the
adjustment lock setting.
• The EEPROM may be faulty on the keypad. A faulty EEPROM will also
trip the soft starter, and the keypad will display the message Parameter
out of range. Contact your local supplier for advice.
ATTENTION! Remove Mains Volts
•
The soft starter will not activate Run Simulation with three-phase power
connected. This prevents unintentional direct on-line (DOL) start.
Line fuses blown.
•
Check the fuse rating and ensure that the selected starting method
matches with the application.

Nidec Digistart D3 Specifications

General

Brand	Nidec
Model	Digistart D3
Category	Controller
Language	English