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Pre-alarmmaintenance

Siemens MXL: Pre-alarm

Siemens MXL·1 view·0 field notes

What This Code Means

A smoke detector has reached a threshold near its alarm point but has not yet reached full alarm status.

Common Causes

  • 1Dust accumulation in detector
  • 2Steam or high humidity
  • 3Early stages of combustion

Resolution Steps

Inspect the detector for contamination and clean if necessary; monitor the area for potential fire hazards.

Manual References(1)

Field Notes

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Related Codes

GROUND FAULT IS OKThe system ground fault test has passed and no ground faults are currently detected.NN:MMM-DDD [custom message] ACK [trouble type] IN TRBA general system trouble has occurred, indicating a fault that may prevent the system from operating correctly.GROUND FAULT IS MINUSThe system has detected a negative ground fault on the field wiring.Tamper SwitchThis is a security-type message for the tamper switch on the SMB-2 board when the system is selected for UL 1076 operation.SYSTEM NORMALThe system is powered and functioning correctly with no active alarms, supervisories, or troubles.

Related Questions

What modules are available to expand the MXL beyond its base configuration, and what is the maximum supported cabinet and loop count?What does 'Loop Trouble' mean on the MXL and how do I clear it?How do I program the MXL using CSGM software?
All MXL trouble codesMXL panel page