WEG SSW-08 User Manual - page 49
6
Solution and Troubleshooting
44 | SSW-08
Protection
Description and
Fault Display
Activation Description
Probable Causes
Reset
Electronic motor
overload
E05
(LED Overload)
Flashing
When the times given by the
programmed thermal class curves
exceed the limit.
Incorrect setting of the “Motor Current”
trimpot (motor current set).
The set value is too low for the motor
being used.
Starting sequence greater than allowed.
Programmed thermal class too low.
Time between Off/On procedures lower
than that permitted by the motor power
refrigeration time.
Load on the motor shaft too high.
Thermal protection value saved when
the control is turned off and brought
back when turned back on.
Power-on.
Reset key.
Auto-reset.
DIx.
Start timeout
during current
limit starting
E62
(LED Fault)
Flashes twice
(LED Ready)
On
When the starting time is longer than
the time set in the acceleration ramp
trimpot.
Active only with current limit starting.
Programmed time for the acceleration
ramp inferior to what is needed.
Value of the programmed current
limitation too low.
Motor locked, rotor blocked.
Power-on.
Reset key.
Auto-reset.
DIx.
Stall
E63
(LED Stall)
Flashing
Activates before full voltage, if the
current is greater than twice the
nominal motor current.
Programmed acceleration ramp time
lower than the actual acceleration time.
Motor shaft is locked
The transformer that supplies the motor
can be saturating and taking too much
time to recover from the starting current.
Power-on.
Reset key.
Auto-reset.
DIx.
Overcurrent
E66
(LED
Overcurrent)
Flashing
It is only monitored when the SSW-08 is
at full voltage.
When the parameters are set with the
factory default values this protection
trips when the motor current exceeds
3 times the value adjusted in the
trimpot (Motor Current) for a time
longer than 1 second.
Short-circuit between phases.
Momentary motor overload.
Motor shaft is locked, rotor blocked.
Power-on.
Reset key.
Auto-reset.
DIx.
Incorrect phase
sequence
E67
(LED Phase Seq.)
Flashing
When the sequence of synchronism
signals interruptions does not follow
the RST sequence.
Network phase sequence inverted at
the input.
May have been changed in another
place of the supply network.
Power-on.
Reset key.
DIx.
Undervoltage
in the control
supply
E70
(LED Fault)
Flashes twice
(LED Ready)
Off
Activates when the control supply
voltage is lower than 93 Vac.
Electronics supply lower than the
minimum value.
Electronics power supply with loose
contact.
Electronics power supply fuse blown.
Power-on.
Reset key.
Auto-reset.
DIx.
Table 6.1: Faults and possible causes(cont.)