WEG SSW-07 Manual Del Usuario página 47

Chapter 6 - SOLUtION aND trOUBLeShOOtING
Protection
Description and
Fault Display
Undervoltage Activates when the control
in the control supply voltage is lower than 93
supply Vac.
E70
(LED Fault)
Flashes twice
(LED Ready)
Off
Internal When there is a fault with the
By-pass relay internal By-pass relay contacts
contact Open at full voltage.
E71
(LED Fault)
Flashes 3 times
(LED Ready)
Off
Overcurrent Activates before the closing
before the of the By-pass if the current is
By-pass greater than:
37.5 A for the models up to 30 A;
E72 200 A for the models from
45 to 85 A;
(LED Fault) 260 A for the model of 130 A;
Flashes 4 times 400 A for the models from
(LED Ready) 171 and 200 A.
Off 824 for the models from 255 A to
412 A.
When the limit is higher or lower
Frequency out
than the limits of 45 to 66 Hz.
of tolerance
E75
(LED Fault)
Flashes once
(LED Ready)
Off
When there is no opening of the
Closed By-pass
internal By-pass contact circuit.
contact or
shorted SCR's
E77
(Fault LED)
flashes 6 times
(Ready LED) is
off
46
Activation Description
table 6.1 - Faults and possible causes (cont.)
Probable Causes
Electronics supply lower than the
minimum value.
Electronics power supply with loose
contact.
Electronics power supply fuse blown.
Loose contact in the starting cables
of the Internal By-pass relays.
Defective By-pass relay contacts due
to an overload
The time programmed for the
acceleration ramp is shorter than the
actual acceleration time.
Nominal motor current higher than
the current that can be supported by
the Soft-Starter.
Motor shaft is locked, rotor blocked.
The line frequency is out of range.
When the Soft-Starter + motor are
being supplied by a generator that
is not supporting the full load or the
start of the motor.
Bad contact in the relay activation
cables, at either internal or external
By-pass.
Defective contacts due to an
overload.
A short-circuit in parallel or external.
Reset
Power-on.
Reset key.
Auto-reset.
DIx.
Power-on.
Reset key.
Auto-reset.
DIx.
Power-on.
Reset key.
Auto-reset.
DIx.
Power-on.
Reset key.
Auto-reset.
DIx.
Power-on.
Reset key.
DIx.