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Ms 5024
Nac 1 Fault
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Trouble Codes
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Ms 5024
Nac 1 Fault
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Bell 1 circuit fault: MS-5024 Trouble Code | Fire Alarm Resource Center
Bell 1 circuit fault
trouble
Fire-Lite MS-5024
95 views
What This Code Means
A fault condition (open or short) exists on Notification Appliance Circuit 1.
Common Causes
1
Broken field wiring
2
Short circuit in notification devices
3
Missing EOL resistor
Resolution Steps
Check NAC 1 wiring for opens or shorts. Verify the presence of the correct EOL resistor. Use Troubleshoot Mode to check circuit voltage.
Manual References
(4)
1
fire-lite
MS-5024
Installation
1997
Open
2
fire-lite
MS-5024UD
Installation
1997
Open
3
fire-lite
MS-5024
Operating Instructions
1994
Open
Show 1 more reference
Getting Bell 1 circuit fault on your MS-5024?
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Field Notes
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Related Codes
Annunciator Fault
Communication has been lost between the main control panel and a remote annunciator.
Primary C. Number Communication Fault
The Digital Alarm Communicator Transmitter (DACT) failed to communicate with the primary central station.
Ground fault
The control panel has detected that a supervised circuit, such as a zone or NAC, is in contact with earth ground.
AC Loss (shown only when requested)
The AC ON indicator turns off and the trouble LED turns on when the AC line voltage drops below the Low Line threshold.
AC Loss
The panel has lost AC power or the voltage has dropped below the brownout threshold.
Related Questions
How do I perform a walk test on the MS-5024 without triggering a full alarm?
How do I set zone types on the MS-5024?
What is the maximum SLC loop capacity of the MS-5024, and which Fire-Lite detectors and modules are compatible?
Bell 1 circuit fault
trouble
Fire-Lite MS-5024
95 views
What This Code Means
A fault condition (open or short) exists on Notification Appliance Circuit 1.
Common Causes
1
Broken field wiring
2
Short circuit in notification devices
3
Missing EOL resistor
Resolution Steps
Check NAC 1 wiring for opens or shorts. Verify the presence of the correct EOL resistor. Use Troubleshoot Mode to check circuit voltage.
Manual References
(4)
1
fire-lite
MS-5024
Installation
1997
Open
2
fire-lite
MS-5024UD
Installation
1997
Open
3
fire-lite
MS-5024
Operating Instructions
1994
Open
Show 1 more reference
Getting Bell 1 circuit fault on your MS-5024?
Ask TroubleShooter AI for help
→
Field Notes
Loading field notes...
Sign in
to share a field note
Related Codes
Annunciator Fault
Communication has been lost between the main control panel and a remote annunciator.
Primary C. Number Communication Fault
The Digital Alarm Communicator Transmitter (DACT) failed to communicate with the primary central station.
Ground fault
The control panel has detected that a supervised circuit, such as a zone or NAC, is in contact with earth ground.
AC Loss (shown only when requested)
The AC ON indicator turns off and the trouble LED turns on when the AC line voltage drops below the Low Line threshold.
AC Loss
The panel has lost AC power or the voltage has dropped below the brownout threshold.
Related Questions
How do I perform a walk test on the MS-5024 without triggering a full alarm?
How do I set zone types on the MS-5024?
What is the maximum SLC loop capacity of the MS-5024, and which Fire-Lite detectors and modules are compatible?
