Appendix I—Troubleshooting Guide
78 S811+ Soft Starter MN03900001E—November 2012
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Thermal Memory
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This parameter is not the same as Thermal Overload.
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Parameter may be viewed in the Monitoring Menu.
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At 100% Thermal memory the soft starter will stop with
a RED status LED.
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At 99% thermal Memory a START command will be
allowed BUT, as soon as 100% is again reached, as it will
be during the start sequence, the soft starter will again
stop.
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Cycling 24 Vdc control power will not reduce the
Thermal Memory value.
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Fault Occurrence Categories
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Immediately when START command is issued.
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During the START ramp, before the internal bypass
contactors close.
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During the Internal Bypass Contactor closure event.
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Anytime during the RUN operation.
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During the STOP (PUMP STOP, SOFT STOP) command.
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Status LED Indication Conditions
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RED
– Active fault is present, cannot RESET.
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GREEN
– Not responding to START command from field wiring.
LEVEL Sense
Insufficient voltage at Terminal “P”.
Insufficient voltage at Terminal “1”.
EDGE Sense
Cycle 24 Vdc at Terminal “1”
Insufficient voltage at Terminal “P”.
Insufficient voltage at Terminal “1”.
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OFF—All
– Check for loss of 24 Vdc control power and/or less
than 17 Vdc.
– Check Terminal Block for condition and security.
– Verify 24 Vdc at appropriate terminals.
– Verify proper operation and capacity of control power
supply.
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START Command Troubleshooting
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From the Terminal Block
– Verify that Terminal “P” is energized continuously.
– Verify that 24 Vdc is applied to Terminal “1” to issue
START command.
– If Terminals “P” and “1” are tied together, verify that
both Terminals receive 24 Vdc START signal.
– If Start Control parameter is set to EDGE, verify that
24 Vdc has been cycled (removed, then reapplied)
after faults have been reset.
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