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High impedancetrouble

Edwards EST EST4: High impedance

Edwards EST EST4·1 view·0 field notes

What This Code Means

The circuit resistance is higher than the main impedance setting, indicating a poor connection.

Common Causes

  • 1Corroded wire terminals
  • 2Poorly executed wire splices
  • 3Use of incorrect wire gauge for long runs

Resolution Steps

Inspect all junctions and splices for integrity. Clean any corroded terminals and ensure all connections are tight.

Manual References(2)

Field Notes

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Related Codes

Shorted conditionA short circuit has been detected on the IDC or NAC circuit wiring.Low impedanceThe circuit resistance is lower than expected but not a direct short.Load deficiencyThe power supply has detected that the batteries cannot support the required system load.Network CPU failureThe main processor for a network node has failed, causing the system to enter degraded mode.Open circuitThe initiating or notification circuit has a break in the wiring or a missing end-of-line resistor.

Related Questions

What are the battery sizing requirements for the EST4, and what is the replacement procedure?How many addressable devices can an EST3 node support, and what cards provide the SLC loops?How do I decode an EST3 trouble address like '03030681'?
All EST4 trouble codesEST4 panel page