SF 09 - System Options #2 storage failure

What does SF 09 mean?

A Storage Failure (SF) error, specifically SF 09, indicates that the slave thermostat's stored System Options #2 settings have been corrupted or lost. This includes options like High Torque Actuator, Damper Modulation, and Set Point Lockout Override. Defaults are mostly OFF.

• Corruption of stored System Options #2 data in the slave thermostat's memory.
• Power fluctuations or system reset causing data loss.
• Internal hardware fault affecting non-volatile memory.

Click steps to track your progress.

1. 1

   Establish communications with the slave thermostat using the PC Command Center software.

2. 2

   Initiate a Device Inquiry for the slave thermostat to verify its current settings.

3. 3

   Perform the 'Modify Device Information' command and navigate to the System Options #2 settings.

4. 4

   Re-enter the correct settings for each option (e.g., High Torque Actuator, Damper Modulation Error Code Display).

5. 5

   Press F1 to 'Perform Update' and wait for acknowledgement to save the new settings.

6. 6

   Exit the configuration menu and program, then verify the System Options #2 are correctly stored.