Issue:
ERMS doesn't work properly
Product Line:
Masterpact NW, NT; Powerpact P, R frames
Resolution:
ERMS doesn't work properly
Product Line:
Masterpact NW, NT; Powerpact P, R frames
Resolution:
- Set IO module to application 3, and Unlocked.
- Ensure wiring is correct per attached bulletin, page 19.
- Follow test procedure beginning on page 16
- Power-cycle the IO module. (Do this step for sure if ERMS doesn't work properly after FW upgrades to the BCM)
- When power is restored, press the TEST button on the IO module.
The trip unit backlight should flash 1 sec. ON and 1 sec. OFF, and the LED on the IO should flash as well. - If the input light I4 does not come on, put a jumper between terminals I4 and C to ensure it is getting a good signal.
Then remove that jumper and place it on terminals 15 and C to turn maintenance mode ON. Light O3 should come on also when I5 and C are jumpered.
If it works with the jumpers but not with the switch, the switch is either bad or mis-wired. - Ensure the IO input lights correspond to the switch (or jumper) positions, and that the O3 (34-35) lights come on when maintenance mode is ON.