Trend 963 Engineering Manual

| Error Code (Display) | Probable Cause (per manual) | Solution | | :--- | :--- | :--- | | Er 12 | RAM battery voltage < 2.0V | Replace CR2032 battery within 30 sec to avoid logic loss | | Er 47 | BACnet MAC address conflict | Check DIP switches 1-7; ensure no duplicates on trunk | | Watchdog Reset | Infinite loop in IT code (GOTO line 10) | Insert WAIT(0,1) to yield processor time | | CAL Err | Analog input reads open circuit | Check 5V reference on terminal 11 (Vref) |

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The manual serves as the primary technical resource for configuring and managing Trend BMS networks. Getting Started & Installation : Covers the 963 Installation Instructions trend 963 engineering manual