It sounds like there could be a few potential issues causing your Wheelock E70-24MCW-FW strobe light to not flash during alarm activation. Firstly, ensure that the strobe light is receiving power and that the wiring connections are secure. Additionally, check if the strobe settings are correctly configured in your fire alarm panel. If everything appears to be in order, it’s possible that the strobe itself may be faulty and requires replacement. I recommend consulting the product manual for troubleshooting steps specific to your model, or reaching out to Wheelock’s customer support for further assistance.