AC Fail or Brownout: MXL Trouble Code | Fire Alarm Resource Center

What This Code Means

Primary AC power is missing or below the brownout level; the System is running on battery backup.

Common Causes

1Primary AC power is missing
2AC power is below the brownout level
3Blown fuses F1 or F2 on the SMB-2
4Tripped circuit breaker on the MPS-6
5Faulty AC or battery wiring

Resolution Steps

Check AC and battery. Check fuses F1 and F2 on the SMB-2 and the circuit breaker on the MPS-6. Check AC and battery wiring. If power connections are OK, check the cable between the SMB-2 and MKB-4 for proper installation.

Manual References(1)

1siemensMXL-IQInstallationp. 102, 144, 103, 149, 148 +16Open

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.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.AC VOLTAGE = X VOLTSDisplay of the current AC input voltage to the system power supply.

Siemens MXL

What This Code Means

Common Causes

Resolution Steps

Manual References(1)

Field Notes

Related Codes

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