VersiStart i III
68
Display
Possible cause/Suggested solution
VZC Fail Px
Where 'X' is 1, 2 or 3.
Internal fault (PCB fault). Contact your local supplier for advice.
This trip is not adjustable.
Related parameters: None
12.3
General Faults
This table describes situations where the soft starter does not operate as expected but does not trip or give a warning.
Symptom
Probable Cause
Starter "Not Ready"
x
Check Input A (53, 55). The starter disable function may be active. If parameter
6D is set to Starter Disable and there is an open circuit on 53, 55, the VersiStart i III
will not start.
The soft starter does not respond to the
START
or
RESET
button on the
keypad.
x
The soft starter may be in Remote control mode. When the soft starter is in Remote
control mode, the Local LED on the starter is off. Press the
LOCAL/REMOTE
button once to change to Local control.
The soft starter does not respond to
commands from the control inputs.
x
The soft starter may be in Local control mode. When the soft starter is in Local
control mode, the Local LED on the starter is on. Press the
LOCAL/REMOTE
button once to change to Remote control.
x
The control wiring may be incorrect. Check that the remote start, stop and reset
inputs are configured correctly (refer to Control Wiring on page 15 for details).
x
The signals to the remote inputs may be incorrect. Test the signalling by activating
each input signal in turn. The appropriate remote control input LED should activate
on the starter.
The soft starter does not respond to a start
command from either the local or remote
controls.
x
The soft starter may be waiting for the restart delay to elapse. The length of the
restart delay is controlled by parameter 5A Restart Delay.
x
The motor may be too hot to permit a start. If parameter 4F Motor Temperature
Check is set to Check, the soft starter will only permit a start when it calculates that
the motor has sufficient thermal capacity to complete the start successfully. Wait for
the motor to cool before attempting another start.
x
The starter may be disabled via a programmable input. If parameter 6D is set to
Starter Disable and there is an open circuit on 53, 55, the VersiStart i III will not start.
If there is no further need to disable the starter, close the circuit on the input.
NOTE
Parameter 6A Local/Remote controls when the
LOCAL/REMOTE
button is enabled.
A reset does not occur after an
Auto-Reset, when using a remote two-wire
control.
x
The remote 2-wire start signal must be removed and reapplied for a re-start.
Non-resettable Thermistor Cct trip, when
there is a link between the thermistor input
64, 65 or when the motor thermistor
connected between 64, 65 is permanently
removed.
x
The thermistor input is enabled once a link is fitted and short circuit protection has
activated.
-
Remove the link then load the default parameter set. This will
disable the thermistor input and clear the trip.
-
Place a 1k2
:
resistor across the thermistor input.
-
Turn thermistor protection to 'Log only' (parameter 16G).
The soft starter does not control the motor
correctly during starting.
x
Start performance may be unstable when using a low Motor Full Load Current setting
(parameter 1A).
x
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.
x
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.
x
The SCRs in the VersiStart i III 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.
