Appendix I—Troubleshooting Guide
S811+ Soft Starter MN03900001E—November 2012 81
14
Overload Fault Fault Trip
Fault Warning
Disable
Motor operation in excess of
115% or rated FLA.
Excessive ramp times.
Excessive starts per hour.
Reduce the motor’s load.
Verify the Overld Trip FLA and/or Ovrld Trip Class for proper
adjustment.
Note: Exceeding nameplate ratings will shorten equipment life.
Fault during motor start: Verify system is not exceeding the specified
maximum starts per hour.
Increase the initial torque and/or reduce ramp time to bring the motor
up to speed faster.
Increase Trip Class setting (30 maximum) and/or reduce ramp time
setting.
Notes:
Normal thermal memory during routine operation may be observed in the Monitoring menu. Higher than normal thermal memory may indicate an
abnormal operating condition and signal an impending Overload fault. After a motor start, the thermal memory should stabilize at a value consistent with
the load.
18
Instantaneous Over
Current
Fault Trip Excessive motor load.
Undersized soft starter.
Reduce starting load.
Increase soft starter capacity (be sure model ratings can handle
current demands).
Notes:
During the Start Ramp Time, the maximum RMS value of the 3 phase current(s) are monitored. Instantaneous Over Current Trip threshold is 6 X catalog
FLA. The Trip Delay is 1.5 seconds and is not user settable. Catalog FLA refers to the maximum continuous line current capacity of the S811+ soft starter,
NOT the motor rated FLA.
Do not confuse this parameter with Over Current (FC10), Thermal Overload (FC14), or SCR Over Current (FC60).
32
Internal NV Memory Fault Trip Component failure on printed
circuit board.
Not repairable in the field.
Contact EatonCare for service.
Notes: Failure can potentially be caused by component exposure to excessive heat or vibration.
36
CommLoss Stop Fault Fault Trip Control communications lost. Reattach network controller, verify that the unit is recognized by the
system controller.
Contact EatonCare for service.
Notes:
This fault corresponds only to network communications. It does not relate to internal communications among components on the printed circuit board (PCB).
38
Temperature Sensor
Fault
Fault Trip
Fault Warning
Disable
Failed sensor.
Failed sensor cable or cable
connection.
Internal hardware failure (sensor and/or cable).
Note: Disabling this feature (Temp Sense Fault in Protection menu)
will remove protection from excessive temperature exposure (not
recommended).
Not field repairable, contact Eaton support.
Notes:
There are three (3) independent temperature sensors that incorporate a current sensor on each power pole (phase). This fault may be generated by any
one of the sensors.
Temperature and/or current values observed in the Monitoring Menu should be within ± 5% of each other. Verify that the values of all phases are
approximately equal. Sensors are calibrated to the printed circuit board (PCB) during manufacture and are not field serviceable. The Device Temp value
shown in the Monitoring Menu monitors a sensor mounted directly on the PCB and is not related to any Temperature Sensor Fault. Contact EatonCare for
service.
39
Internal CPU Fault Trip Hardware failure on the printed
circuit board (PCB) Firmware is
corrupted.
Contact EatonCare for support.
Notes: Failure can potentially be caused by component exposure to excessive heat or vibration.
40
Motor Low Power Fault Trip
Fault Warning
Disable
Average power has decreased
below the low threshold set by
user.
Inspect application for cause of low power.
Decrease Low Power Trip threshold
Notes:
Rated Power = √3 x .8 Power Factor x Motor FLA x Motor Voltage. As an example, the Rated Power for an application with a Motor FLA or 156 amps at a
voltage 460 Vac = 99.4kW. Motor Low Power range is 0–100% (default 50%) of this calculated value.
S811+ Fault Codes, continued
Code Fault Status Condition Solution
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