S611 Soft Starter MN03902011E—May 2012 www.eaton.com 31
2. With the Fault LED illuminated, the device will not start.
Attempt to reset the S611 soft starter by pressing the
S611’s RESET button for one second. If the LED
remains illuminated, use the User Interface Module (UI)
to determine the Protection Fault LED or fault code and
go to the S611 Fault Codes in Appendix G—
Troubleshooting Guide to find the corrective action for
the fault code.
3. The Ready LED is illuminated and the S611 soft starter
is ready to start. Determine the start source from the
table on Page 30 to aid in determining the appropriate
corrective action. Verify that the permissive input
terminal is at 120 Vac, then start the S611 from the
Control Input terminal block, TB3.
Note: If connected to a network, starting the S611 from
the Control Input terminal block (TB3) may isolate
problems associated with the network and not with the
soft starter.
4. It is often useful in evaluating a trip condition to note
when the trip occurs during operation of the S611 soft
starter. The operation of the S611 may be categorized
into the following periods:
• The S611 soft starter trips during the START ramp
and never reaches bypass
• The S611 soft starter trips when the bypass
contactors are closed
• The S611 soft starter trips during running operation
while bypass contactors are closed
• The S611 soft starter trips after the Stop command is
received
• The S611 soft starter stops sooner than expected
during a soft stop. If the Soft Stop Time is set too
long for the motor loading (high loads), the motor will
begin to stall when delaying SCR firing reduces the
voltage. The S611 soft starter will detect this stalling
due to the increase in current flow and end the stop
immediately and not indicate any faults
Use the flowchart on Page 32 to aid in determining the
appropriate corrective action during the various run
phases of operation.
Note: If no fault codes are present during an unexpected
“trip” of the soft starter, verify that the soft starter did
not receive a STOP command.
Detailed information describing fault codes and
corrective action may be found in Appendix G—
Troubleshooting Guide.
S611 Stopped or Faulted
Condition Possible Problem Suggested Corrective Action
Ready LED illuminated,
no Fault LED
• Stop command received
• Terminal block wiring not secure
• Loss of 120 Vac control power
• Transient fault when Reset mode set to AUTO
• External control device failure
• External mains device failure or trip condition
• Control board failure
• 120 Vac permissive signal lost—investigate control system
• Check control wiring for security
• Check 120 Vac power source for correct sizing and circuit
connections
• Change Reset mode to Manual to capture fault condition
• Inspect external control devices for proper operation
• Inspect external devices for condition and proper operation
• Possible device fatal error
Fault LED illuminated • Protection/Operation parameters not set to
proper values
• Fault condition exists in mains circuit
• Fault not reset from previous trip
• Reset mode set to Manual
• Determine Fault condition from the Mode LEDs and the fault
code displayed in the alpha numeric display
• Adjust Protection/Operation parameter values to prevent
recurring fault trips
• Correct problems with mains voltages and/or phase
conditions
• Attempt to reset fault—the fault will not reset if the fault
condition exists
• Set Reset mode to Manual to retain soft starter in fault
condition for troubleshooting. Correct fault condition and
change Reset mode to Auto if desired
• Reset mode set to Manual and no Reset signal was sent to
the soft starter. Reset soft starter or change Reset mode to
AUTO
No LEDs illuminated,
alpha numeric display dark
• No control power supply
• Device failure
• Provide 120 Vac to control power terminal block TB1
• Check control power for proper value and reliability
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