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Edwards Est
Est4
Telephone Line Trouble
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Telephone Line Trouble: EST4 Trouble Code | Fire Alarm Resource Center
Telephone Line Trouble
trouble
Edwards EST EST4
65 views
·
0 field notes
What This Code Means
The Modem Communicator has detected a fault on one or both of the supervised telephone lines.
Common Causes
1
Disconnected telephone jack
2
Cut phone line
3
Loss of service from the provider
Resolution Steps
Verify the physical connection of the modular phone jacks and test the telephone lines for active voltage/dial tone.
Manual References
(2)
1
edwards est
EST4 Submittal Guide
Submittal Guide
2023
p. 10, 12, 21
Open
2
edwards est
EST4 User Guide
User Guide
2019
p. 13, 15, 16, 17, 19 +2
Open
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Related Codes
Trouble
General fault within the system hardware or wiring that prevents normal operation.
Building
Controlled building equipment such as dampers, fans, or temperature controls are not operating correctly.
Ground fault
The 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 loop
A shorted circuit has been detected on the Signature loop controller (SLC) wiring, which typically reports a trouble condition on all devices on that circuit.
SUPERVISORY
The 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?