Rockwell Automation 193 193-5.0: Bulletin 913/592 SMP-3 Solid-State Overload Relay User Manual
Page 95
Chapter 9 – Troubleshooting and Fault Information
9-3
Failure Type
Action to Take
General Problem
Trip
Relay
The trip relay does not appear to be
functioning correctly.
1. Remove power from the SMP-3 overload relay, then check the wiring to control terminals 30
and 40.
2. Induce a Test fault on the SMP-3 by turning the Test DIP switch On. The SMP-3 overload
relay should fault and the Trip LED should flash one time. There should also be an audible
click corresponding to the trip relay opening. Turn the Test DIP switch Off and reset the fault.
There should be another audible click corresponding to the trip relay closing.
3. Remove power from the SMP-3 overload relay, then remove the trip relay wiring. Reapply
power to terminals 50 and 60. Check the impedance across the trip relay terminals 30 and
40. When the SMP-3 overload relay is energized and no fault exists, the trip relay should be
closed
(Z ' 0W). When the SMP-3 overload relay is de-energized or faulted, the trip relay
should be open
(Z ' High impedance).
Power
Up
The green Power LED on the SMP-3
overload relay does not turn on when
power is applied to the SMP-3.
1. Remove power from the SMP-3 overload relay, then check the wiring to control terminals 50
and 60 on the SMP-3 overload relay.
2. Apply power to the SMP-3 overload relay, then check terminals 50 and 60 to ensure the
control voltage is present and is within the rating of the SMP-3 input.