| No. | Year | Principal Class | Equipment | Purpose | Defect Part | Phenomenon | |
|---|---|---|---|---|---|---|---|
| 5 | 2018 | BOLL | 6.18 | Service | The setting was not applicable and furthermore, some of the filter control function was totally not working. The back flushing sequence was not matched and also not working lamp test function and also not possible sequence working. | 보기 | |
| 4 | 2018 | BOLL | 6.18 | Service | 보기 | ||
| 1 | 2018 | BOLL | 6.18 | Service | Control function not working, back flushing sequence mismatched. | 보기 | |
| 2 | 2018 | BOLL | Service | 보기 | |||
| 6 | 2017 | BOLL | 6.18.3 | Service | countersunk screws and anchor bar (ID:5710455) | filter insert pulling out, missing lower gasket due to heavy damage of mesh. | 보기 |
| 3 | 2017 | BOLL | 6.18.3 | Service | 보기 |