
Appendix I—Troubleshooting Guide
84
S811+ Soft Starter
MN03900001E—November 2012
64
V Zero Cross Lost
Fault Trip
Mains voltage lost.
Phase L1 or L3 lost.
Load disconnected
Restore mains or lost phases.
Verify that the load is connected and any disconnect devices are
properly engaged.
Contact EatonCare for service.
Notes:
The SCRs are unable to fire if there is no source voltage or load on the unit. Verify that all mains control devices are properly connected and powered
prior to initiating a START command.
65
Analog Input
Out-of-Range (high)
Fault Trip
Fault Warning
Disable
Upper range limit exceeded.
Set operating range of input to correct value.
Validate calibration of analog circuit.
Inspect analog circuit for failed components or circuitry.
Set range limit to proper value.
Notes:
Two ranges of analog operation are available and are user settable: Analog input ranges are 2.0–20.0 ma DC and 4.0–20 ma DC. If analog input is above
maximum limit of the range, the input range or scaling should be adjusted.
66
Analog Input
Out-of-Range (low)
Fault Trip
Fault Warning
Disable
Lower range limit exceeded.
Set operating range of input to correct value.
Validate calibration of analog circuit.
Inspect analog circuit for failed components or circuitry.
Set range limit to proper value.
Notes:
Two ranges of analog operation are available and are user settable: Analog input ranges are 2.0–20.0 ma DC and 4.0 –20 ma DC. If analog input is below
the minimum limit of the range, the input range or scaling should be adjusted.
71
Analog Input
Overdrive
Fault Trip
Fault Warning
Disable
Analog input current has
exceeded 25ma.
Analog current input has exceeded maximum limitation.
Notes:
This input will revert to a voltage input functionality. A soft reset is required to restore current input functionality.
72
External Trip/Warning Fault Trip
Fault Warning
Disable
External input signal indicates
fault or warning
Trip/Warning action commanded by external device.
Trip/Warning signal lost due to broken or damaged external circuitry.
Notes:
Input signal is 24 Vdc maintained. Removal or loss of signal will initiate Trip/Warning action in accordance with user selected parameter settings.
73
Motor Load
Disconnect
Fault Trip
No load
Motor being driven by application.
Repair/replace failed couplings.
Increase load.
Reduce
Low I Trip % FLA
to an acceptable value (0% will disable).
Notes:
When the internal bypass contactors are closed, the average value of the 3 phase currents is monitored as a % of FLA.
Low I Trip (Motor Under Load) threshold range is 1–100% (default 6%). The Trip Delay is 2 seconds, and is not user settable.
74
Line Frequency (high) Fault Trip
Fault Warning
Disable
Mains input voltage frequency
has increased above the threshold
set by the user.
Reduce line frequency to within limits.
Adjust parameter limits.
Notes:
To address line frequency instability and/or excessive variations, adjust limit parameters according. This protection may be set to Fault Warning Status
to allow continued operation during excessive frequency variations.
Line Frequency (high)
trip level threshold range is 5–150% (default 150%) of line
voltage. The
Line Frequency Trip Delay
range is 1–60 seconds (default 3 seconds).
S811+ Fault Codes, continued
Code
Fault
Status
Condition
Solution