General Information
50
S801+ Soft Starter
MN03900002E—November 2012
www.eaton.com
15
Power Pole Over
Temperature
SCR temperature is above limits.
Ventilate to specified maximum temperatures
Operating environment above specified
maximum temperature.
Clear obstructions.
Ventilation holes blocked.
Verify fans are operational,
Fans are not operational.
Verify system is not exceeding the specified maximum starts per hour.
Starts/hour exceed specifications.
Verify bypass contacts are closing at the end of ramp time.
Sensor failure on power pole.
Reduce excessive cabinet temperature.
Bypass contactor(s) failed to close.
Soft Starter running continuously in JOG mode.
Notes:
Any power pole temperature in excess of 100°C will cause a fault trip. The soft starter will attempt to close the bypass contactors at the end of
the ramp time, or if the motor is up to synchronous speed for 30 seconds. If the bypass contactors close, then open, then close, etc. several times,
the contactor(s) may be failing to seal electrically. A common report of this condition is “chattering” of the soft starter. After the 30 second time
period, the unit will discontinue attempting to close the bypass contactors and will continue to run on the SCRs. At some point in the future, the
unit will very likely overheat due to insufficient cooling of the power poles.
If the soft starter is run continuously in the JOG mode, the starter will use the normal start parameters, BUT the bypass contactors will not close.
Running continuously on the SCRs will generate more heat than can be dissipated by the internal fans, resulting in an over temperature fault trip.
16
SCR Not Firing
SCR is not conducting when gated.
Incoming phase lost.
SCR failure.
Special application—undersized or high
impedance motor
Re-apply lost phase.
Load disconnected.
Review S801+ application.
Circuitry damaged by megger testing.
Contact EatonCare for service.
Notes:
Verify that both mains and load lines are connected and secure. Verify that any isolation and/or reversing contactors are properly engaged prior
to the soft starter receiving a START command. If the current draw is significantly less than the frame size of the soft starter (less than 1/16 of
motor FLA), not enough current may be flowing to allow the SCRs to fire. If this fault occurs immediately when the START command is issued,
isolation contactors may be open and/or in transition.
22
Phase Loss
Incoming phase disconnected.
Repair broken connection.
Open fuse or breaker.
Replace fuse.
Phase imbalance exceeds specifications or
trip parameter.
Inspect system for phase imbalance conditions.
Severe voltage phase imbalance.
Notes:
Phase loss is a severe condition of phase imbalance, even momentarily. In cases of severe imbalance causing nuisance trips, this feature may be
disabled (not recommended). Phase performance should be monitored for an appropriate length of time to ensure that the phase is not dropping
just long enough for the soft starter to detect the condition.
S801+ Fault Codes, continued
Code
Fault
Condition
Solution
Summary of Contents for S801+ Series
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