1. AI4CH Inspection Procedure

To perform a proper inspection of AI4CH, follow the steps below:

1. Use a tester to measure the detector input current of the faulty AI4CH channel.
2. Compare the measured current with the value indicated in I/O CONDITION.
3. While checking the current, confirm that there are no concentration fluctuations in surrounding channels or modules.
4. If there is a discrepancy between the measured and indicated values, reset the channel.
   • Refer to Section 3: AI4CH Reset Procedure.
5. If the discrepancy persists even after resetting, replace the module.
   • Acceptable deviation: ±0.2mA.

⚠️ Caution:

• Ensure that the tester is properly calibrated before measuring the current.
• Avoid unnecessary contact with adjacent channels to prevent signal interference.

2. Detector Interference Check Procedure

To verify if there is interference affecting the AI4CH detector, proceed as follows:

1. Observe the detector values in I/O CONDITION while operating the equipment.
2. Check if nearby electrical devices are causing unintended fluctuations in the detector readings.
3. Temporarily isolate the suspected interference source and recheck the detector’s stability.
4. If interference persists, contact the maintenance team for further analysis.

⚠️ Caution:

• Unexpected external signals may cause inaccurate readings.

3. AI4CH Reset Procedure

If an AI4CH channel needs to be reset, follow the steps below:

1. Press the Log-in button and enter 0815 to access system settings.
2. Navigate to I/O-Setting from the right sidebar.
3. Click on Analog Input.
4. Select the channel to reset.
5. Click 3.3 AI Channel Init... to initialize the selected channel.
6. Press OK to confirm and complete the reset process.

⚠️ Warning:

• Resetting the channel may cause temporary loss of sensor data. Ensure the system is not actively in use.
• If the issue persists after resetting, a hardware replacement may be required.

Post-Reset Verification

After resetting AI4CH, perform the following to verify the reset was successful:

1. Check the detector input current and compare it with the expected value.
2. Monitor surrounding channels for any unexpected fluctuations.
3. Confirm that the reset channel is operating normally in I/O CONDITION.

If problems persist, proceed with module replacement.

System Restart Procedure

If resetting does not resolve the issue, restart the system as follows:

1. Turn off the system power.
2. Wait at least 10 seconds to ensure all capacitors discharge.
3. Turn on the system power and allow it to boot completely.
4. Verify AI4CH functionality and recheck detector readings.

⚠️ Caution:

• Restarting the system may interrupt ongoing processes. Perform only when necessary.