Emerson Rosemount 700XA Reference Manual page 138

Power Failure
Potential cause
The gas chromatograph (GC) has experienced a restart, caused by a power failure, since alarms were last cleared.
Recommended action
Allow the GC to automatically restart in Warm Start mode.
During Warm Start mode, the GC does the following:
a. Waits for the heaters to stabilize.
b. Purges the sample loop.
c. Actuates the valves for two cycles.
After completing these actions, the GC switches to auto-sequence mode.
User Calculation Failure
The gas chromatograph (GC) has detected one or more errors while parsing a user-defined calculation.
Potential cause
This usually happens when a user-defined calculation attempts to use a system variable that does not exist.
Recommended action
Fix the calculation that is referring to the undefined system variable.
Low Battery Voltage
The gas chromatograph (GC) has detected a low battery voltage on the central processing unit (CPU) board.
Recommended actions
Replace the CPU board immediately to avoid losing GC configuration data.
a) Save the diagnostic data file. In MON2020, go to Tools → Save Diagnostic Data.
b) Power down the GC.
c) Ensure that SW7 on the CPU board is in the On position.
d) Replace the CPU board.
e) Restore configuration back to the GC. In MON2020, go to File → Restore Configuration to GC..
Preamp Board 1 or Preamp Board 2 Comm Failure
The gas chromatograph (GC) cannot detect the preamp board.
Recommended actions
1. Power the GC down completely.
2. Check that the board is properly seated in the correct slot (Preamp1 or Preamp2) on the backplane.
In MON2020, select Hardware → Installed Hardware for hardware slot locations.
3. Power up the GC.
4. If the message appears again, replace the preamp board.
Flame ionization detector (FID), flame photometric detector (FPD), or µFPDG2 (FPDG2) Failure
Alert message identifies FID/FPD or FPD G2 hardware. The FID/FPD or µFPD is not detected.
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July 2020
Emerson.com/Rosemount