SF 05 - Supplemental Heat Damper Position/Damper Size storage failure

What does SF 05 mean?

A Storage Failure (SF) error, specifically SF 05, indicates that the slave thermostat's stored Supplemental Heat Damper Position and Damper Size settings have been corrupted or lost. The system will default to 0 for position and 4r for size. These settings relate to how supplemental heating affects damper operation.

• Corruption of stored supplemental heat damper 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 Supplemental Heat Damper Position and Damper Size settings.

4. 4

   Re-enter the correct values for these supplemental heat damper settings.

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 settings are correctly stored.