Resource Center Tools

Sign In

Sign In

Home
Resources
Trouble Codes
Silent Knight
5207
L1

Resource Center

Browse

Home Questions252 Trouble Codes688 Panels24 Panel Specs24

Learn

Community

Tools

Common Categories

System TroubleSupervisoryGround FaultNACCommunicationPowerDeviceNetwork

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.

Recommended SupplierSponsored

Fire Alarm Parts for Old and New Systems

Panels, detectors, modules and signals
50+ brands, current and legacy
Order by 3 pm ET, ships same day
90-day warranty on every part

Shop Fire Alarm Parts

Can't find what you need?

Resource Center

Questions Panels Trouble Codes Panel Specs NFPA 72-2025

Legal

Privacy Policy Terms of Use Disclaimer DMCA

Cookie Preferences

Company

About Us Blog Glossary Contact Us

© FACP Manuals LLC. All rights reserved.

Built by Will

L1: SK-5207 Trouble Code | Fire Alarm Resource Center

L1

trouble

Silent Knight SK-5207

67 views·0 field notes

What This Code Means

A trouble condition or fault exists on phone line 1.

Common Causes

1Phone line voltage drops below 3 VDC
2Telephone service is interrupted for longer than 45 seconds
3Physical fault in the phone line

Resolution Steps

Monitor the DC voltage present on the lines to ensure it does not drop below 3 VDC for longer than 40 seconds. Verify that the telephone service has not been interrupted. Ensure the phone lines are programmed properly according to the manual's programming steps.

Manual References(3)

1silent knight5207Operations1995Open

2silent knight5207Datasheet1998Open

3silent knight5207Installation2003p. 80, 87, 83, 78, 86 +11Open

Field Notes

Loading field notes...

Sign in to share a field note

Related Codes

A1Indicates a trouble condition on notification circuit 1 (bell output 1) or that the power supply and panel voltage selections are not the same.A2A trouble condition exists on notification circuit 2 (bell output 2), or the power supply and panel voltage selections are not the same.DATA LOSTThe communicator has lost data that was being transmitted to the central station, or the alarm memory buffer is full.FAILED DFThe communicator has failed to report an event to the central station after the programmed number of attempts have been made.L2A trouble condition or fault exists on phone line 2.

Related Questions

How do I wire Class B vs. Class A zone loops on the SK-5207, and what end-of-line resistor value is required?What does the P3 (Earth Ground Fault) trouble code mean on the SK-5207, and how do I isolate the fault?How do I program Relay 3 on the SK-5207 to activate on all trouble conditions?

All SK-5207 trouble codes SK-5207 panel page