Soft Starters Eaton’s reduced voltage soft starters are compact, multi-functional, easy to install, and easy to program. They are designed to control acceleration and deceleration of three-phase motors, with options available for current ranges from 0.8 A through 1,000 A.

Technical Tips & FAQs

Causes and Troubleshooting Shorted SCR on PCS, PF or PCE Softstarters

Questions:

What does it mean when a soft starter LED flashes six (6) times for PCS/PCE or PF LCD displays F4/F5/F6 to indicate a shorted SCR error? How can I verify and what tests can be performed to determine if an SCR is shorted? How can I trouble shoot and clear this fault? Can I over ride this fault?

Some causes of shorted SCRs in softstarters:

Loose 3 phase power connections or damaged conductors on line side of the PCS/PF/PCE controller
Wire conductor damage on the load side of the PCS/PF/PCE controller to the motor
Damage to windings inside the motor
The PCS/PF/PCE control module has sustained physical damage to control circuit board components
Power surges, spikes, disturbances, over voltage conditions present in the 3 Phase Power distribution circuits can cause SCR's to breakdown and short
Excessive levels of voltage and current present in the three phase power supply to the PCS/PF/PCE soft starter can cause SCR's to breakdown and short

Troubleshooting:

The shorted SCR check is performed internally by the PCS, PF or PCE softstarter as a pre-start check. A start command will not be issued to the softstarter if a Shorted SCR condition is detected.
Note: Shorted SCR Faults cannot be overridden through a parameter change for PF or dip switch change for PCS/PCE.

See the following steps below to troubleshoot and resolve these faults:

Verify the PCE dip switch 15, or PF motor connection selection is set to the proper motor connection type. Set it to Line Connection for three lead Motors (Dip switch 15 Up for PCE); set it to Delta Connection for six lead Wye Start Delta Motors (Dip switch 15 Down for PCE).
Verify 3 phase power connections on line side of the PCS/PF/PCE controller are tight; correct damage to conductor cables.
Verify conductors on load side of the PCS/PF/PCE controller going to the motor are tight; correct damage to conductor cables.
Verify motor windings are not damaged by meggering the motor. Remove motor leads from the PCS/PF/PCE controller before using a Megger to measure and test the motor windings.
If the PCS/PF/PCE soft starter has the shorted SCR error, perform resistance checks across each of the power poles (L1 to T1, L2 to T2, L3 to T3).
The resistance check across all 3-phases should be 10,000 ohms or greater if the SCR is okay and is not shorted. A shorted SCR will have much less resistance than the normal 10,000 ohm reading. Before performing these checks, do the following:
- Remove the motor leads from the bottom of the PCS/PF/PCE soft starter
- Remove three phase and control power from the PCS/PF/PCE soft starter

Borderlands 2 cracked lan fix need for speed. Contact

Mark Harris, Product Manager

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Benshaw Soft Starter Manual