Eaton S801+ Series, User Manual

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General Information
S801+ Soft Starter
MN03900002E—November 2012 www.eaton.com
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23 Bypass Failure Internal bypass contactor(s) not closed and/
or electrically sealed after ramp time. Verify all bypass contactor(s) close (audible noise). Measure voltage
drop line to load.
Contactor(s) opened in bypass. Verify all bypass contactor(s) not opening during run cycle due to
excessive vibration and/or shock. Reduce levels of vibration and/or
shock.
Starter is being operated continuously in
JOG mode. Verify control power and wire size meet specifications.
Verify that the control power supply meets the 24 Vdc voltage and
current requirements of the IT soft starter.
Notes:
This fault may occur even if just one contactor (larger soft starters have multiple contactors) fails to seal electrically, of if the contactors opens
during operation. If the firmware detects that the bypass contactor(s) have failed to close (as measured by the voltage drop across the power
poles), the firmware will command the contactors to release (open) and then reapply the signal to the coil of the contactor(s). this process may
repeat for 30 seconds. If after 30 seconds, and the bypass contactor(s) have failed to close electrically, the firmware will discontinue the signal to
close the contactor(s) and the soft starter will rum utilizing the SCRs. Bypass contactors may open during the motor run from excessive shock or
24 Vdc control voltage sag (insufficient voltage and/or current to maintain contact closure). If the soft starter is running continuously on the SCRs
(or in JOG mode) an S.S. Trip fault may occur after a period of time. If the fault occurs after the STOP command, it is likely that one or more
contactors did not seal electrically during the START ramp and the unit has been running on the SCR(s).
24 Instantaneous Over Current Excessive starting current. Reduce starting load.
Excessive 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 6X
catalog FLA. Catalog FLA refers to the maximum continuous line current capacity of the S801+ soft starter, NOT the motor rated FLA.
25 Phase Imbalance The voltage or current imbalance of the
incoming phases exceeds the trip threshold. Correct imbalance problem with mains.
Disable the fault if the other issues cannot be resolved.
Notes:
Phase imbalance may be impacted by voltage issues and/or current issues.
26 Internal NV Memory Internal memory error. Component failure on printed circuit board.
Contact EatonCare for service.
31 Voltage Zero Cross Lost Mains voltage lost. Restore mains or lost phases.
Phase L1 or L3 lost. Verify that the load is connected and any disconnect devices are
properly engaged.
Load disconnected 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.
32 Shorted SCR SCR is shorted. Test resistance of each phase.
Internal bypass contactor welded shut. Contact EatonCare for service.
No load on the SCRs when START command
is issued (motor disconnected).
Notes:
Shorted SCRs are the most common mode of SCR failure. With power completely removed from the unit, measure the resistance of each pole,
line to load. If the resistance is near zero (less than 5 ohms), it is most likely that the SCR is shorted. Resistance of a serviceable SCR is
approximately 10k ohms. Resistance typically moves to a lower value as the SCR ages. This feature may be disabled (not recommended).
Unit compares voltage drop across the SCRs to conclude if the SCRs are “shorted”. When a Start command is issued with no load connected,
there is no voltage drop as there is no current flow.
S801+ Fault Codes, continued
Code Fault Condition Solution