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Edwards Est
Est4
Load Deficiency

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Troubleshooting Tip

When diagnosing codes, always check the event history log first. Many trouble conditions are intermittent and tied to environmental factors like temperature or moisture.

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Load deficiency: EST4 Trouble Code | Fire Alarm Resource Center

Load deficiency

trouble

Edwards EST EST4

71 views·0 field notes

What This Code Means

The power supply has detected that the batteries cannot support the required system load.

Common Causes

1Aged or depleted batteries
2Bad battery cell
3Loose battery terminal connections

Resolution Steps

Perform a battery load test. If the batteries fail to hold a charge under load, replace them with new units of the same rating.

Manual References(2)

1edwards estEST4 Submittal GuideSubmittal Guide2023p. 10, 12, 21Open

2edwards estEST4 User GuideUser Guide2019p. 13, 15, 16, 17, 19 +2Open

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Related Codes

TroubleGeneral fault within the system hardware or wiring that prevents normal operation.BuildingControlled building equipment such as dampers, fans, or temperature controls are not operating correctly.Ground faultThe system detects a low resistance path (approximately 10 kΩ or less) between a circuit conductor and earth ground, or voltages outside the range of 12.3 VDC to 16.8 VDC during testing.A short is detected on the loopA shorted circuit has been detected on the Signature loop controller (SLC) wiring, which typically reports a trouble condition on all devices on that circuit.SUPERVISORYThe control unit enters the supervisory state when a point signals a supervisory condition, such as a valve tamper switch activation or a system-level supervision fault.

Related Questions

How do I perform a walk test on the EST4, and can individual SLC loops be isolated for testing?What is the maximum SLC loop length and device count per loop on the EST4?What are the battery sizing requirements for the EST4, and what is the replacement procedure?

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