Anjian Digital High Voltage Error Code List
# Digital High-Voltage Error Code Reference Table
| No. | Fault Phenomenon | Fault Cause |
|-----|-----------------|-------------|
| 1 | Displays E00 | Communication failure between the console and the generator main unit |
| 2 | Displays E01 | Unused |
| 3 | Displays E02 | Filament heating abnormality; filament current too low |
| 4 | Displays E03 | X-ray tube assembly temperature protection |
| 5 | Displays E04 | Rotating anode startup voltage abnormality |
| 6 | Displays E05 | Rotating anode startup current abnormality |
| 7 | Displays E06 | Filament heating abnormality; filament current too high |
| 8 | Displays E07 | Generator remains in standby state for too long |
| 9 | Displays E08 | Exposure time too long; occurs only in mAs exposure mode |
| 10 | Displays E09 | Door interlock switch not closed |
| 11 | Displays E10 | Detector operating mode switching failure |
| 12 | Displays E11 | Detector fails to return the required exposure acknowledgment signal |
| 13 | Displays E12 | High-voltage maximum over-limit protection |
| 14 | Displays E13 | High-voltage sampling value too high protection |
| 15 | Displays E14 | Asymmetry protection between +kV and -kV |
| 16 | Displays E15 | +kV overvoltage protection (hardware protection) |
| 17 | Displays E16 | -kV overvoltage protection (hardware protection) |
| 18 | Displays E17 | High-voltage sampling value too low protection |
| 19 | Displays E18 | Tube current over-limit protection (hardware protection) |
| 20 | Displays E19 | Tube current sampling value too high protection (software protection) |
| 21 | Displays E20 | Tube current sampling value too low protection (software protection) |
| 22 | Displays E21 | mAs timeout protection |
| 23 | Displays E22 | IGBT overcurrent protection (hardware error) |
| 24 | Displays E23 | IGBT short-circuit protection (hardware error) |
| 25 | Displays E24 | IGBT short-circuit protection (hardware error) |
| 26 | Displays E25 | IGBT short-circuit protection (hardware error) |
| 27 | Displays E26 | Oil tank arcing |
| 28 | Displays E27 | Hand switch fault |
| 29 | Displays E28 | Rotating anode thermal capacity protection |
---
## Detailed Troubleshooting Procedures
1. **E00: Communication failure between the console and the generator main unit**
The console and generator main unit perform a handshake command to verify communication every time they power on. If the handshake fails, E00 is displayed. Troubleshooting steps:
a. Check if the communication cable connectors are loose, and use a multimeter to test continuity of each conductor in the communication cable.
b. Verify that the generator main control board MCU is working properly by observing LED 208 on the main control board; if it flashes, the MCU is functioning normally.
c. Check if the communication chips U302 on the generator main control board and U21 on the console main control board are operating normally.
2. **E01: Unused**
3. **E02: Filament heating abnormality; filament current too low**
The filament heating circuit consists of the main control board, filament board, high-voltage oil tank, and X-ray tube. Troubleshooting steps:
a. Confirm good contact of the connecting ribbon cable between the main control board and filament board, the connecting wires between the filament board and high-voltage oil tank, and the high-voltage cables.
b. Measure the filament resistance of the X-ray tube with a multimeter to confirm no open circuit.
c. Enter the filament current adjustment mode. The MAST voltage value at the test point on the main control board should satisfy:
`MAST voltage = Filament setting value × 1/200`
d. The VIN voltage at the filament board test point is 1.3V in standby mode. When the hand switch is pressed to position 1, the VIN voltage should be 2/3 of the MAST voltage value.
e. Select the large focus. In standby mode, the AC voltage between COM and LF on the filament board connector CX2 should be approximately 20V.
4. **E03: X-ray tube assembly temperature protection**
The X-ray tube temperature protection signal is input via the rotating anode cable to the integrated control board, converted, and then sent to the main control board. Troubleshooting steps:
a. Check if the X-ray tube temperature is too high; if so, pause exposure and wait for it to cool. If the temperature is normal, check if the X-ray tube temperature protection relay is closed.
b. Check the contact of the 20-core ribbon cable between the rotating anode cable, integrated control board, and main control board.
c. Check if LED MV1 on the integrated control board is lit. If it is lit, the signal path from the rotating anode to the integrated control board is normal, indicating a problem with the main control board detection. If it is not lit, the signal path from the rotating anode to the integrated control board or the voltage conversion circuit on the integrated control board is faulty.
5. **E04 / E05: Abnormal rotating anode startup**
When the hand switch is pressed to position 1, the main control board MCU sends a startup signal. The signal RV1 at pin 2 of the integrated control board connector PX5 changes from open-collector to 0V, activating relay RK1 on the rotating anode board. This outputs 175V through voltage sensor RVT and current sensor RIT to the rotating anode motor to complete startup. If the RVT feedback signal is abnormal, E04 is displayed; if the RIT feedback signal is abnormal, E05 is displayed. Troubleshooting steps:
a. Confirm the rotating anode motor is in good condition and the rotating anode cable is correctly connected.
b. Confirm the voltages at pins 3, 4, and 5 of the rotating anode board connector X3 are 220V, 175V, and 60V respectively. If incorrect, check if fuse F2 on the circuit board is blown.
c. Check the RV1 signal at pin 2 of the integrated control board connector PX5; it should change from open-collector to 0V when the hand switch is pressed to position 1.
d. Check pins 6 and 7 of the rotating anode board connector X3; both should read approximately 175V when the hand switch is pressed to position 1.
e. Verify the feedback signal from the voltage sensor (RVT). Measure the AC voltage between pins 1 and 2 of the integrated control board connector PX4 when the hand switch is pressed to position 1; it should be approximately 8V.
f. Verify the feedback signal from the current sensor (RIT). Measure the AC voltage between pins 3 and 4 of the integrated control board connector PX4 when the hand switch is pressed to position 1; it should be approximately 8V.
6. **E06: Filament heating abnormality; filament current too high**
Troubleshooting steps are the same as for E02.
7. **E07: Generator remains in standby state for too long**
To protect the X-ray tube, the generator program is set to interrupt the exposure and display E07 if the generator remains in standby for more than 3 seconds without the hand switch being pressed to position 2.
E07 may also occur if the detector feedback signal (IN1 at main control board X7) does not go low within 1 second after the hand switch is pressed to position 2.
8. **E08: Exposure time too long (only in mAs mode)**
The generator program is set to interrupt the exposure and display E08 if the exposure time reaches the maximum allowable value for the mA/kV combination, but the mAs value has not yet reached the console setting. For example, at 100kV/160mA, the maximum allowable mAs is 160, giving a maximum exposure time of 1s. If the exposure reaches 1.2s and the mAs value is still below the setpoint, E08 will trigger. This is typically caused by the +mA feedback voltage being lower than normal. Troubleshooting steps:
a. Confirm good contact of the connecting cable between the high-voltage oil tank and the main control board.
b. Confirm the feedback voltage at the +MA test point on the high-voltage sampling board is normal. The +MA feedback voltage is obtained from a 40Ω sampling resistor (20Ω for 50kW high-voltage). For example, at 100mA tube current, the voltage at the +MA test point during exposure should be `0.1 × 40 = 4V`.
9. **E09: Door interlock switch not closed**
Check if pins 5 and 6 of the main control board connector X2 are shorted. Under normal conditions, they are shorted by the door interlock switch; an open circuit will trigger E09.
10. **E10: Detector operating mode switching failure**
Dynamic DR confirms the detector is operating in the correct mode (1K or 3K) before each exposure. If the host PC fails to return the detector's operating mode within the specified time, the high-voltage system will display E10. This fault only occurs in dynamic DR systems. Troubleshooting: Check the detector and host PC software for normal operation.
11. **E11: Detector fails to return the required exposure acknowledgment signal**
Before each exposure, the high-voltage system sends a detector synchronization signal via integrated control board JX2. The detector must send an acknowledgment signal back to integrated control board JX3 within 1 second, which then reaches the MCU via main control board X7 (the IN1 pin should go low). If the high-voltage system does not receive this signal, E11 is generated.
12. **E12: High-voltage maximum over-limit protection**
If the kV sampling exceeds 130kV in small focus mode or 153kV in large focus mode, exceeding the maximum allowed kV values, E12 is triggered.
13. **E13: High-voltage sampling value too high protection**
If the actual high-voltage sampling value is 20kV higher than the expected value, indicating the kV is too high, an error is reported.
14. **E14: Asymmetry protection between +kV and -kV**
If the difference between +kV and -kV exceeds 10kV, an error is reported.
15. **E15: +kV overvoltage protection (hardware protection)**
If the +kV sampling exceeds the threshold (7.8V) set by the comparator, an error is reported.
16. **E16: -kV overvoltage protection (hardware protection)**
If the -kV sampling exceeds the threshold (7.8V) set by the comparator, an error is reported.
17. **E17: High-voltage sampling value too low protection**
If the voltage is still below 5kV 5ms after exposure starts, an error is reported.
18. **E18: Tube current over-limit protection (hardware protection)**
If the tube current exceeds the maximum hardware-set threshold, an error is reported.
19. **E19: Tube current sampling value too high protection (software protection)**
If the tube current exceeds the maximum value of 800mA or the threshold set by the expected value, an error is reported.
20. **E20: Tube current sampling value too low protection (software protection)**
If the tube current sampling is below 10mA 4ms after exposure starts, an error is reported.
21. **E21: mAs timeout protection**
In ms mode, if the mAs value exceeds the set threshold, an error is reported.
22. **E22: IGBT overcurrent protection (hardware error)**
23. **E23, E24, E25: IGBT short-circuit protection (hardware error)**
24. **E26: Oil tank arcing**
At maximum exposure power, arcing in the oil tank may occur, usually accompanied by severe fluctuations in the kV waveform. The system will automatically stop the exposure and report the error upon detection.
25. **E27: Hand switch fault**
The system checks if the hand switch signal is released immediately upon power-on (to prevent accidental exposure if the switch is stuck). If the hand switch is pressed, an error is reported and the system will not enter exposure mode.
26. **E28: Rotating anode thermal capacity protection**
When the rotating anode thermal capacity exceeds the protection threshold, the system prompts that the thermal capacity has been exceeded. It is recommended to rest for 10 minutes or use low-dose exposures to avoid damaging the X-ray tube.