What does error code 8.1 on IGD series D LIM or Line isolation monitor mean?

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Issue:
What does error code 8.1 on IGD series D LIM or Line isolation monitor mean?

Product Line:
LIM - Line isolation Monitor

Environment:
IGD series D LIM

Cause:
Error code 8.1

Resolution:
LIM displays Er (error code) 8.1 either continuously or intermittently. The LIM may have been in operation for some time or may display this problem on start up.

Possible cause: One of the field connected lead wires from the LIM terminal board to the
remote indicator alarm (Cat. No. IA-NC) may have a short circuit to ground.

Action: Disconnect power to the LIM. Remove the field connected remote indicator lead
wires at the LIM terminal board. Re-energize the LIM; if the problem is corrected
examine the lead wires to the remote indicator for a possible short circuit to ground
using an ohmmeter. The impedance between any of the three remote indicator lead
wires and ground should be very high (greater than 1 Mohm). Repair the short circuit
to ground and reconnect the lead wires to the remote indicator. Re-energize the LIM to
verify repair of the short circuit.

Note: The use of solid conductors is not recommended for the field connected remote
lead wires.