A tamper error occurs when the panel is reading that the sensor's cover is not attached properly. To address the tamper error on your DSC PG9303 door/window sensor, follow the instructions below.
1. Open the cover by inserting a coin into the slot, then twist to remove. If a coin is not available, insert a 4mm flat screwdriver into each slot of the plastic cover, then stwist to open each side.
2. Ensure the battery is correctly installed and that there are no loose springs or obstructions preventing the cover from fitting snugly with the sensor.
3. Close the device cover, ensuring the cover snaps completely into place and conforms with the sensor.
You will also need to clear the error from the panel memory by following these instructions: How to Clear Alerts on the IQ Panel 2.