MIX-2351AP/(A)AP Smoke Detector

MIX-2351AP(A) device going into False Alarm or Auto Test fail.

The MIX-2351AP(A) smoke sensor with a date code starting with “3” (e.g. 3021, 3032 etc) may cause the panel to go into false alarm or auto test failure depending on the firmware and panel the device is installed on. This issue is due to a design change, which deviates from published specifications made by System Sensor to the parameter value on the device itself that is causing an adverse effect on our panels listed below.

Affected Panels:

FX-2000N ‘FleXNet’12.1.xx
FX-4000N ‘FleXNet MP’1.0.xx


Change the device to CLIP protocol or Disable the Auto Test feature located in the job configuration file.

Use the following steps to gather the data necessary to quickly identify if any of the MIX- 2351AP(A) on your system is causing the issues listed above.

  1. Use the following link to download Tera Term:
  2. In Tera Term, enable run an AP parameter report. See the link below for How to do this:
  3. Once the report is captured send the report and a description of the trouble to the Mircom Applications email: [email protected]

Mircom strives to offer the highest quality products and services, on occasion an issue may require field action, and we regret when these issues arise. As part of our commitment to quality, we incorporate any findings into a continuous improvement process to better serve our customers in the future. As part of our support offering, please feel free to contact us with any inquiries or assistance you may require. If you have any questions or concerns, please contact the Technical Support Department at [email protected].