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Good News: The Altronix AL602ULADA is still manufactured. We carry replacement boards, batteries, and power supplies for this unit in our Austin warehouse.
Are you wondering why your Altronix AL6020LADA (AL602ULADA) is dropping a trouble relay and causing your main fire panel to beep? Whether you are dealing with a dead backup battery or a grounded strobe circuit, identifying the exact trouble code is the first step to getting your Austin building back in compliance.
Common Altronix AL602ULADA Trouble Codes
- AC LED OFF (AC Fail): The unit has lost 120VAC power. Check the main circuit breaker or the 5A/250V input fuse on the power supply board.+1
- DC LED OFF (No Output): The 24VDC output has failed. This usually indicates a blown fuse, a short circuit on the loop, or a dead main board.
- OUTPUT LED BLINKING (Loop Trouble): An open or short circuit exists on that specific Notification Appliance Circuit (NAC). The blink pattern tells you if it is a current trouble (long blink) or memory (short blink).+2
- BAT FAIL (Bat Fail Terminals): The backup batteries have dropped below 21VDC or are missing entirely. Altronix power supplies require two 12V 7AH or 12AH batteries.
Are your strobes flashing out of sync? The Altronix AL602ULADA is the workhorse of fire alarm power, but improper dip-switch settings can cause strobes to drift or fail. Whether you need a simple battery replacement, a new logic board, or a full system test, our technicians can verify your ‘Sync Protocol’ is set correctly for System Sensor, Wheelock, or Gentex devices.
Frequently Asked Questions: Altronix AL602ULADA Troubleshooting
The Altronix power extender itself does not have a built-in buzzer. However, when it detects an internal issue (like a ground fault or a battery failure), it drops a trouble relay that sends a signal back to your main fire alarm control panel. If your main panel is beeping and pointing to the Altronix unit, a technician will need to check the extender’s internal LED lights to isolate the specific fault.
A NAC (Notification Appliance Circuit) FAULT means there is a wiring issue on the loop that connects your building’s horns and strobes. This could be an open wire, a short circuit, or a loose end-of-line resistor. Because this fault means your life safety devices might not activate during a fire, a licensed technician needs to trace the circuit to find the break.
An AC FAIL indicates that the Altronix panel has lost its primary 120VAC power and is now draining your backup batteries to keep the system alive. First, check your building’s electrical room to ensure the dedicated fire alarm breaker hasn’t tripped. If the breaker is on but the panel still shows an AC FAIL, the internal power supply board has likely failed and will need to be replaced by a local technician.
While swapping the two 12V backup batteries seems like a simple fix, commercial fire alarm systems in Texas must be serviced by a licensed fire alarm technician. Replacing the batteries without testing the panel’s charging circuit is a common mistake that often leads to the new batteries dying a few days later. A licensed tech will verify the charging voltage so you don’t fail your next Austin fire marshal inspection.
Ground faults are notoriously difficult for in-house maintenance teams to find because a wire could be touching the conduit anywhere in the building. Our local Austin repair technicians have the specialized multimeters and training to trace and isolate the short quickly. If the Altronix main board has been damaged by a power surge, we carry replacement parts to get your system back online as fast as possible.
