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What does the error code EF on a current IG6 line isolation monitor indicate?

Issue:
What does the error code "EF" on a current IG6 line isolation monitor indicate?

Product Line:
Hospital Isolation Panels

Environment:
Troubleshooting

Cause:
Determination of error code

Resolution:
The ER code will also indicate an "L1, L2 etc" which will indicate  Line 1, Line 2, etc.
ER on the line isolation monitor display indicate extreme fault. Suggest unplugging everything in the room, one at a time to isolate the device causing the error.  Or turn of each secondary
circuit breaker in the panel one at a time, leave the breaker off for a few seconds, then turn it back on.  This may also indicate which circuit is causing the error in the display.
This then allows the line isolation monitor to recheck the system.

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