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Low impedancetrouble

Edwards EST EST4: Low impedance

Edwards EST EST4·1 view·0 field notes

What This Code Means

The circuit resistance is lower than expected but not a direct short.

Common Causes

  • 1Moisture in junction boxes
  • 2Partial short circuit
  • 3Too many devices installed on a single circuit

Resolution Steps

Check for moisture or contaminants in device bases and junction boxes. Verify the total device load does not exceed circuit specifications.

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.Load deficiencyThe power supply has detected that the batteries cannot support the required system load.Power offThe system has lost primary AC power and is running on battery backup.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