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NN:MMM-DDD [custom message] ACK [trouble type] IN TRBtrouble

Siemens MXL: NN:MMM-DDD [custom message] ACK [trouble type] IN TRB

Siemens MXL·1 view·0 field notes

What This Code Means

A general system trouble has occurred, indicating a fault that may prevent the system from operating correctly.

Common Causes

  • 1Open circuit in field wiring
  • 2Short circuit in field wiring
  • 3Module communication failure
  • 4Power supply fault

Resolution Steps

Identify the specific trouble type and device address on the display, then inspect the associated wiring or hardware for faults.

Manual References(1)

Field Notes

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Related Codes

Pre-alarmA smoke detector has reached a threshold near its alarm point but has not yet reached full alarm status.GROUND FAULT IS MINUSThe system has detected a negative ground fault on the field wiring.GROUND FAULT IS PLUSThe system has detected a positive ground fault on the field wiring.GROUND FAULT IS OKThe system ground fault test has passed and no ground faults are currently detected.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.

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