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Pre-alarm
maintenance

Siemens MXL

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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 PLUSThe system has detected a positive ground fault on the field wiring.GROUND FAULT IS MINUSThe system has detected a negative ground fault on the field wiring.AC Fail or BrownoutPrimary AC power is missing or below the brownout level; the System is running on battery backup.GROUND FAULT IS OKThe system ground fault test has passed and no ground faults are currently detected.[custom message] [device type] IN SUPA condition indicating that a monitored device or system has changed to an off-normal state, which takes priority over security and trouble conditions.

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 are the battery requirements and backup power calculations for the MXL?What is the purpose of the BCM-12A-C battery charger module on the MXL, and how many batteries does it support?
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