6
Instructional Leafl et
IL03901003E
Effective May 2011
DS7 series soft start controllers, Frame 1 (4–12A)
EATON CORPORATION
www.eaton.com
LED operation and troubleshooting
The operation, warning, and fault status of the controller may be
determined by observing the pattern of LED illuminations. Only one
condition may exist at any one time, with fault indications taking
priority over others.
As conditions change, LED status will also change.
For example, during the initialization stage, the RED and GREEN
LED’s will flash alternately. When initialization is complete and the
Enable signal is present, the GREEN LED will then flash one time
per second and the RED LED will be off.
LED operations/warning indications
Table 11.
Operation
1 Second
Initialization
Off
Supply voltage connection without enable
Supply voltage connection with enable
In ramp
TOR
Warnings
Overtemperature for next start
Start without enable
Potentiometer not effective, network operation
In the event of a motor stop due to a trip condition by the soft start
controller, the FAULT status LED will be illuminated (flashing). In this
case, one or more conditions found in
Table 12
may have occurred.
Tables 13
,
14
and
15
may be used for evaluation or troubleshooting
and contain additional information on operations and operating
conditions.
LED fault indications
Table 12.
Faults
1 Second
Overtemperature, thyristor (I2t)
Overtemperature electronic
Over/under temperature heat sink
Thyristor is defective
Phase failure
Bypass is defective
Supply voltage faulty
Normal operation indications
Table 13.
Status
LED
Condition
Action
Off
GREEN—Off
RED—Off
Control voltage is not applied to
terU
s
and –A2.
No action required.
Note:
Possible device failure if power is applied to these terminals and no LED’s are illuminated.
Initialization
GREEN—4x/s, pulse 1/8s
RED—4x/s, pulse 1/8s
alternating
Control power is applied to terminals
+U
s
and –A2.
If the unit fails to properly initialize, verify that the notes
LED indicates are correct. If the LED indications are not
correct, the unit requires service.
Note:
When control power is applied to terU
s
and –A2, the unit enters a short initialization period. If the initialization sequence fails,
remove and reapply power.
Supply voltage connection
without enable
GREEN—1x/s, pulse 1/8s
RED – 1x/s, pulse 1/8s
simultaneous
No control power signal at terminal EN.
Apply control power enable signal to terminal EN to allow
RUN command
Note:
Enable signal may be tied to RUN command signal.
Supply voltage connection
with enable
GREEN—1x/s, pulse 1/8s
RED—Off
Unit ready for RUN command.
Apply RUN command to teA1 to perform start.
Note:
After successful initialization, the soft start controller is ready to perform START and RUN functions.
In ramp
GREEN—1x/s, pulse 1/2s
RED—Off
Unit is in START ramp.
Unit is in STOP ramp.
START ramp and STOP ramp (if selected) operation is
indicated.
Note:
Set ramp times as short as practical. Ramp times should be adjusted to expire approximately 2 seconds after the motor has achieved
synchronous RPM. Motor rotation (START) should occur within 2 seconds of RUN command. STOP ramp cannot shorten coast-to-stop time (no
braking function). Motor acceleration/deceleration times are load dependent.
TOR (Top of Ramp)
GREEN—Continuous
RED—Off
Start ramp complete bypass contacts
closed.
Unit is in normal operation.
Note:
After a successful START ramp, the bypass relays close and the soft start controller is in a RUN condition. TOR will remain illuminated
until RUN command is removed for coast stop or STOP ramp. Auxiliary relay contacts will change state at the same time as the TOR LED.
