Rockwell Automation 193 193-5.0: Bulletin 913/592 SMP-3 Solid-State Overload Relay - Manual (Page 94)

Chapter 9 – Troubleshooting and Fault Information
9-2
GENERAL TROUBLESHOOTING PROCEDURES
The following steps are a few techniques that can be used to troubleshoot the SMP-3.
Failure Type General Problem Action to Take
OUT A
or
OUT B
OUT A or B do not appear to turn on when
commanded to do so. 1. Check the supply voltage.
2. Remove power from the SMP-3 overload relay, then check the wiring to control terminals 10
and 20.
3. Check for a fault condition. If a fault exists, refer to the Fault Information section in this
chapter for instructions on how to clear the fault.
4. Check the appropriate OUT A or B status LED. If the appropriate status LED does not turn
on, check the communication connection. Refer to Communication Loss Fault in Table 9.B.
5. Remove power from the SMP-3, then check the user replaceable fuse on the side of the
SMP-3 overload relay. If the fuse is open, replace the fuse with the correct fuse size and type
as specified in Appendix A. Check the control circuits for shorts and verify that the circuit
does not exceed the maximum voltage or current rating of the outputs.
6. Check the Logic Mask parameter. Refer to Chapter 8 for programming instructions.
OUT A
or
OUT B
The contactor connected to OUT A or B
appears to “chatter” when the OUTPUT is
turned on. 1. Verify that the appropriate OUT A or B LED remains On.
2. Check the control voltage. Verify that the voltage is within the SMP-3 output and contactor
coil ratings.
3. Remove power from the SMP-3 overload relay. Verify that all control terminal wiring is
properly fastened.
OUT A
or
OUT B
The contactor connected to OUT A or B
appears to “chatter” when the OUTPUT is
turned off. 1. Verify that the appropriate OUT A or B LED remains Off.
2. Check the control voltage. Verify that the current and voltage are within the SMP-3 OUT A or
B ratings. Then consult the factory.