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Comfort Automation/ Security System Forums > Support > Problems & Troubleshooting > Firmware Upgrading Problems > Slave comm failure and then instant recovery after upgrade to 7.207
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slychiu

10-19-2023, 11:46 AM
You can downgrade  to an older version using the ETH03 or UCM. You do not need the upgrading cable unless you have a problem.
select the firmware from https://www.cytech.biz/slave_firmware.html

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Comfort Automation/ Security System Forums > Support > Problems & Troubleshooting > Firmware Upgrading Problems > Slave comm failure and then instant recovery after upgrade to 7.207