The unit failed to complete calibration because no gas was applied within twelve minutes or gas was left on longer than twelve minutes. The manual's first action is: “Remove gas, if present. Apply magnet to GM logo on the cover to clear fault. Re-calibrate, if necessary.”
- Model
- General Monitors S4000TH
- Display shows
- Failed to Complete the Calibration (F2)
- Type
- Fault code
- Source
- Manual p. 38
What F2 means
Failed to Complete the Calibration p. 38
If the 12 minute timeframe elapses and the calibration is not complete (unit must return to "0" reading for calibration to be considered complete), the unit's display will show an "F2" fault. p. 29
Re-applying the magnet over the GM logo returns the unit to operational mode with the previous calibration values unchanged. p. 34
Common causes
- The unit is placed in the calibration mode and no gas is applied within twelve minutes, or if gas is left on for more than twelve minutes. p. 38
Safety warnings — read before you start
- WARNINGWARNING. Only suitably skilled and competent personnel should carry out installation and maintenance. p. 16
- WARNINGWARNING. The S4000TH Intelligent Sensor contains components, which can be damaged by static electricity. Special care must be taken when wiring the system to ensure that only the connection points are touched. p. 16
What to do
- Remove gas, if present. Apply magnet to GM logo on the cover to clear fault. Re-calibrate, if necessary. p. 38
If F2 is still not resolved
- Remove gas, if present. Apply magnet to GM logo on the cover to clear fault. Re-calibrate, if necessary. p. 38 “Remove gas, if present. Apply magnet to GM logo on the cover to clear fault. Re-calibrate, if necessary.”
This page summarises what the manufacturer’s manual says about F2; each statement links to the page it comes from, and quoted lines are copied word for word. It is not a substitute for the manual or for a qualified installer. ManualLib is not affiliated with General Monitors. Found a mistake? Report an error.