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Insufficient voltagetrouble

Edwards EST EST4: Insufficient voltage

Edwards EST EST4·1 view·0 field notes

What This Code Means

The power supply voltage has dropped below the minimum operating threshold.

Common Causes

  • 1Loss of AC primary power
  • 2Failed power supply charging circuit
  • 3Excessive current draw on the 24VDC rails

Resolution Steps

Check the AC power source and circuit breakers. Measure the output voltage of the power supply and check for overloaded circuits.

Manual References(2)

Field Notes

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Related Codes

High impedanceThe circuit resistance is higher than the main impedance setting, indicating a poor connection.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.Maintenance Not CleanAn addressable smoke detector has reached a contamination level of 80% or greater and is at high risk of false alarm.Shorted conditionA short circuit has been detected on the IDC or NAC circuit wiring.

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