Solutions And Troubleshooting; Faults And Possible Causes - WEG SSW-07 Manual Del Usuario

6.1 FAULTS AND
POSSIBLE
CAUSES
Protection
Description and
Fault Display
Phase loss or At starting: It occurs when there
Undercurrent is no voltage in the power supply
terminals (R/1L1, S/3L2 and
E03
T/5L3) or when the motor is
disconnected.
(LED Phase At full voltage: It trips when
Loss) the current stays below the
Flashing programmed value longer than
the programmed time.
Referring to the nominal motor
current.
When the parameters are set
with the factory default values,
then this protection trips after
elapsing 1 second with phase
loss either at the input or at the
output (motor). It trips when the
current circulating through the
SSW-07 is less than 20 % of
the value adjusted at the Motor
Current trimpot.
Over When the heatsink temperature
temperature is superior to the limit.
in the power Also trips when the temperature
section sensor is not connected.
E04
(LED Fault)
Flashes once
(LED Ready)
On
44
SOLUTION AND TROUBLESHOOTING
When an error is detected, the Soft-Starter is blocked (disabled)
and the LED's indicate this error by means of intermittent flashes.
In order that the Soft-Starter operates normally again after an error
trip, it is necessary to reset it. This procedure is performed in the
following ways:
 Disconnecting and reapplying the AC power (power-on RESET);
 Pressing the "RESET" key in the SSW-07 front panel (RESET
key);
 Automatically by the automatic RESET. Enable this function via
DIP Switch (auto);
 Via digital input DI2 or DI3.
Activation Description
table 6.1 - Faults and possible causes
Probable Causes
In hydraulic pump applications, it may
be running with no load.
Phase loss in the three-phase
network.
Short-circuit or fault at the thyristor or
By-pass.
Motor not connected.
Motor connection is incorrect
Loose contact in the connections.
Starting problems with the input
contactor.
Input fuses are blown.
Incorrect programming of the Motor
Current trimpot.
Motor current consumption lower
than required for phase loss
protection to work.
Shaft load too high.
Elevated number of successive
starts.
Internal temperature sensor not
connected.
Starting cycle requires ventilation kit
(models from 45 A to 200 A).
6
Chapter
Reset
Power-on.
Reset key.
Auto-reset.
DIx.
Power-on.
Reset key.
Auto-reset.
DIx.