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supervisory

Edwards EST EST4

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What This Code Means

A firefighter telephone handset has been plugged into a remote phone jack.

Common Causes

  • 1Firefighter attempting communication
  • 2Testing of the phone circuit

Resolution Steps

Acknowledge the call at the main command center and establish communication or remove the handset to clear the event.

Manual References(2)

Field Notes

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Related Codes

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.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.TroubleGeneral fault within the system hardware or wiring that prevents normal operation.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.Maintenance Not CleanAn addressable smoke detector has reached a contamination level of 80% or greater and is at high risk of false alarm.

Related Questions

How do I perform a walk test on the EST4, and can individual SLC loops be isolated for testing?What are the battery sizing requirements for the EST4, and what is the replacement procedure?What is the maximum SLC loop length and device count per loop on the EST4?
All EST4 trouble codesEST4 panel page