SF 08 - System Options #1 storage failure

What does SF 08 mean?

A Storage Failure (SF) error, specifically SF 08, indicates that the slave thermostat's stored System Options #1 settings have been corrupted or lost. This includes critical options like Local Setback Control, Zone Pressure Independent Operation, and Zone Supplemental Heat. Defaults are mostly OFF.

• Corruption of stored System Options #1 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 #1 settings.

4. 4

   Re-enter the correct settings for each option (e.g., Local Setback Control, CFM Calculation, Zone Supplemental Heat).

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 #1 are correctly stored.