An E12 fault is the result of the high-pressure sensors reading input pressure above 100 psi.  N2 Input pressure is always being monitored and the fault could occur at any point during a run. The fault will interrupt the run and wait for the operator to correct the problem. This problem can result from one of the following causes:
 
1)    The regulator was inadvertently adjusted too high.
Typically, the problem is a result of the regulator inadvertently being adjusted too high. Check the regulator and reset it to 50-55 psi if needed. If the problem is corrected, you can resume a run that is in-progress.

2)    The dial on the regulator is broken.
Check the regulator setting and compare it with the reading from the Pressures screen under Diagnostics.  The Diagnostics / Pressures screen displays in absolute pressure which includes atmospheric + gauge pressure.  Therefore, if the gauge pressure reads 50 psi and atmospheric pressure is 14.5 psi, the pressure displayed in the Diagnostics / Pressures screen will be 64.5 psi.  Confirm that this is the case.  If the gauge is broken and is reading low and if the regulator has been adjusted too high, it could possibly have been adjusted beyond 100 psi causing this fault.  If this is the case, you will need to replace part TDF61 Pressure Regulator 60 psi.

3)    The High-Pressure Sensor has become disconnected.
To determine if this is the case, you will need to open the electrical enclosure.  First, turn power off to the instrument. Then remove the back and top panels to the electrical enclosure.  Clear the bench in front of the instrument and remove the four front clamp bars and set them aside. Tilt the instrument forward.  From the front of the instrument view the right side of the electrical enclosure. There are two, 5 cm x 10 cm circuit boards, one of which is labeled “MUX-P”. On this circuit board is a white connector that is labeled “J10”. Make sure this is plugged in.  If it is loose or has become dislodged from the three pins below the J9 connector this would cause a false high-pressure reading and an E12 fault. Also make sure the red, black, and white wires are secure within the white J10 connector. If a secure connection is restored, retest the pressure. Staying clear of the open electrical enclosure, turn the power back on to the instrument and recheck the input pressure reading. If this is now in the typical 60-70 psi range, the problem is resolved.  Turn power off to the instrument, close the electrical enclosure, and return the instrument to use.

4)    The High-Pressure Sensor is not working.
If the all the above possibilities have been explored and the problem persists, replace the TDF16 High Pressure Sensor using Service Procedure TS002.
 
For further assistance, contact ANKOM Technology at 
https://www.ankom.com/contact/technical-services or 1-315-986-8090.
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