WEG SSW-06.0205 User Manual page 140

FAULT DESCRIPTION OF THEACTUATION
E65 When the current is lower than the
Motor Undercurrent at programmed during the programmed time.
full voltage operation Motor rated current is used as reference.
E66 When the current is higher than the
Motor Overcurrent at programmed during the programmed time.
full voltage operation The rated motor current is used as
reference.
E67 When the signal interruption sequence of
Wrong phase the synchronism do not follows the
sequence at start R/1L1, S/3L2, T/5L3 sequence.
begin
E70 When the supply of the control board power
Undervoltage at the supply is lower than 93,5Vac.
Electronics supply
E71 When any problem with the contacts of the
Internal By-pass relay By-pass relay, internal or external, has been
contact is open
detected at full voltage after start.
E72
When at the end of the acceleration ramp
Overcurrent before
the current is not lower than 2x the rated
By-pass closing
current of the Soft-Starter (P295x2) before
closing of the internal By-pass relay.
E74
When the current of one of the phases is
Current unbalance
lower or higher during the programmed time.
The other motor phases are used as
reference.
E75
When the frequency is lower or higher than
Line frequency out of
the limits from 42,5 to 69Hz during more than
range
0.5s.
E76
When at the end of the acceleration ramp
Undercurrent before
the current is lower than 0,1x the rated
By-pass closing
current of the Soft-Starter (P295x0,1)
before closing of the internal By-pass relay.
E77
When the contact of the By-pass relay, internal
By-pass relay contact
or external, will not opened.
is closed
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com
CHAPTER 8 - DIAGNOSTICS AND TROUBLESHOOTING
POSSIBLE CAUSES
The percent value programmed as maximum
acceptable undercurrent limit (P610) is lower than
required for the motor and its application.
In applications with hydraulic pumps which ay be
operated without load.
The percent value programmed as maximum
acceptable overcurrent limit (P612) is lower than
required for the motor and its application.
Motor with instantaneous overload.
Stalled motor or locked rotor.
Parameter P620 has been programmed without
need. Wrong phase sequence.
This can be changed in another point of the power
supply line.
Phase loss in the control board supply.
Bad contact in the control board supply.
Fuse in control board supply is open,
glass fuse 5x20mm 2A with delayed action.
Bad contact of the internal or extenal By-pass relay
supply.
Bad contact of the internal or extenal By-pass relay
due to any overload. an overload
P140=1 without external By-pass relay connected.
Rated Soft-Starter current has been wrong
programmed at P295.
The time programmed at P102 is shorter than
required for the motor start by voltage ramp.
Motor rated current is higher than allowed for the
Soft-Starter.
Stalled motor or locked rotor.
Value programmed at P614 and P615 is out of
range and not allowed for this application.
Voltage drop in one or more phases of the power
supply.
Phase loss in the power supply.
Input transformers have been undersized.
Input fuses are open.
Bad contact of the power supply connections or
connections to the motor.
When the Soft-Starter + motor are being supplied
by a generator that is unable to drive the motor at
rated load or is unable to start the motor.
Power supply fault or thyristor fault before Bypass
closing.
The rated Soft-Starter current has been wrong
programmed at P295.
Rated motor current is lower than the minima
current (P295x0.3).
For tests you can set P616=0.
Bad contact of the internal or external By-pass relay
due to any overload. an overload.
Short Circuit in the contact of the internal or external
By-pass relay due to any overload. an overload.
Short Circuit in parallel with the contact of By-pass:
thyristor in short circuit, external short circuit.
Table 8.1 (Cont.) - Detailed Fault Description
RESET
Power-on
Manual Reset
Auto-reset
DIx
Power-on
Manual
ResetAuto-
reset
DIx
Power-on
Manual Reset
DIx
Power-on
Manual Reset
DIx
Power-on
Manual Reset
DIx
Power-on
Manual Reset
DIx
Power-on
Manual Reset
Auto-reset
DIx
Power-on
Manual Reset
DIx
Power-on
Manual Reset
DIx
Power-on
Manual Reset
DIx
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