Solution And Troubleshooting; Faults And Possible Causes - WEG SSW-08 Manual Del Usuario

6. SOLUTION AND TROUBLESHOOTING

6.1 FAULTS AND POSSIBLE CAUSES

When a fault is detected, the Soft-Starter is disabled and the Fault Code is displayed by flashing
LEDs.
To restart the Soft-Starter after a fault has occured it must be reset. In general, resetting can be
done as follows:
Disconnecting and reapplying the AC power (power-on RESET);
„
Pressing the "RESET" key in the SSW-08 front panel (RESET key);
„
Automatically by the automatic RESET. Enable this function via DIP Switch (auto);
„
Via digital input DI2 or DI3.
„
Protection
Description and Activation Description
Fault Display
Phase loss or At starting: It occurs when there is no
Undercurrent voltage in the power supply terminals
(R/1L1, S/3L2 and T/5L3) or when the
E03
motor is disconnected.
With the motor running: It trips
(LED Phase when the current stays below the
Loss) 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-08 is less than 20 % of the
value adjusted at the Motor Current
trimpot.
Over temperature When the heatsink temperature is
in the power superior to the limit.
section Also trips when the temperature
sensor is not connected.
E04
(LED Fault)
Flashes once
(LED Ready) On
Table 6.1: Faults and possible causes
Percentage values programmed as
maximum acceptable limit.
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.
Undersized input transformer.
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.
Solution and Troubleshooting
Probable Causes Reset
6
Power-on.
Reset key.
Auto-reset.
DIx.
Power-on.
Reset key.
Auto-reset.
DIx.
SSW-08 | 43