HEAD PID overload error / PID reverse error / PID lock error
Error code
- 000841 HEAD PID overload error
- 000843 HEAD PID reverse error
- 000844 HEAD PID lock error
Occurrence condition
- The Head Drive Motor has been driven more than a predetermined amount, but the sensor cannot detect it.
- The Head Drive Motor is rotating in reverse
- The Head Drive Motor cannot rotate
Assumed cause
When the motor rotates in a direction different from the rotation direction (there was a sudden load abnormality, and the motor rotated in the opposite direction due to the reaction force)
Power not turn on or motor cannot rotate at all
The load of the Head Drive Motor is more than expected
Related parts
Harness polarity wrong
Head HP Sensor
Head Drive Motor failure
The motor load exceeds the expected
Damage or foreign substances to rotating component part
MCU Board failure or Power Supply (+42V) failure
Improper installation of the Head Unit
Step |
Confirmation and action |
YES |
NO |
|---|---|---|---|
| 1 | Print Head transport fixture Has the head transport fixture been removed? Remove and store it if necessary. Is the trouble phenomenon still occurring? |
Go to step 2 | End |
| 2 | Check the Head Unit for installation Is head unit installed properly? Remove and reinstall it if necessary. Is the trouble phenomenon still occurring? |
Go to step 3 | End |
| 3 | Check the head duct for installation Is the head duct properly engaged with the guide? Remove and reinstall it if necessary. Is the trouble phenomenon still occurring? |
Go to step 4 | End |
| 4 | Check the screws for the Head Unit Are the 4 head unit screws installed properly? Remove and reinstall them if necessary. Is the trouble phenomenon still occurring? |
Go to step 5 | End |
| 5 | Check parts around the head motor Is there contact between the head motor scale and the head motor encoder? Remove and reinstall it if necessary. Is the trouble phenomenon still occurring? |
Go to step 6 | End |
| 6 | Check the posture of the HP Sensor, Head Is the HP Sensor, Head installed properly? Remove and reinstall it if necessary. Is the trouble phenomenon still occurring? |
Go to step 7 | End |
| 7 | Cap transport fixture Has the cap transport fixture been removed? Remove and store it if necessary. Is the trouble phenomenon still occurring? |
Go to step 8 | End |
| 8 | Check the cap carriage for installation Is the cap carriage installed properly? Remove and reinstall it if necessary. Is the trouble phenomenon still occurring? |
Go to step 9 | End |
| 9 | Check the Cap Unit for installation Is the cap unit properly engaged with the guide? Remove and reinstall it if necessary. Is the trouble phenomenon still occurring? |
Go to step 10 | End |
| 10 | Check the screws for the Cap Unit Are the 3 cap unit screws installed properly? Remove and reinstall them if necessary. Is the trouble phenomenon still occurring? |
Go to step 11 | End |
| 11 | Check parts around the cap motor Is there contact between the cap motor scale and the cap motor encoder? Remove and reinstall it if necessary. Is the trouble phenomenon still occurring? |
Go to step 12 | End |
| 12 | Check the posture of the HP Sensor, Cap Is the HP Sensor, Cap installed properly? Remove and reinstall it if necessary. Is the trouble phenomenon still occurring? |
Go to step 13 | End |
| 13 | Check for foreign substances Check for foreign objects on the path of the head movement in the head motion unit. Remove any foreign objects. Is there anything wrong? |
Go to step 14 | End |
| 14 | Check a damage of rotating component part Visually check the gear trains of the head motion mechanism for foreign objects, falling off or damage, and reassemble if necessary. Is the trouble phenomenon still occurring? |
Go to step 15 | End |
| 15 | Check the cables between the Head HP Sensor and Main Board Visually check the cables between the Head HP Sensor and the Main Board, and if there are any cables that are not fully inserted in the connector or disconnected, reconnect them. Is the trouble phenomenon still occurring? |
Go to step 16 | End |
| 16 | Check the cables between the Head Drive Motor and MCU board Visually check the cables between the Head Drive Motor and the MCU board, and if there are any cables that are not fully inserted in the connector or disconnected, reconnect them. Is the trouble phenomenon still occurring? |
Go to step 17 | End |
| 17 | Replace the Head HP Sensor Replace the Head HP Sensor. Is the trouble phenomenon still occurring? |
Go to step 18 | End |
| 18 | Replace the Head Drive Motor Replace the Head Drive Motor. Is the trouble phenomenon still occurring? |
Go to step 19 | End |
| 19 | Parts replacement Replace the MCU board, the Main Board, and the Power Supply Box in that order. Is the trouble phenomenon still occurring? |
Go to step 20 | End |
| 20 | Check for foreign substances Check for foreign objects on the path of the cap movement in the cap motion unit. Remove any foreign objects. Is there anything wrong? |
Go to step 21 | End |
| 21 | Check a damage of rotating component part Visually check the rotating component parts of Cap Motion mechanism missing or damages, and reassemble if necessary. Is the trouble phenomenon still occurring? |
Go to step 22 | End |
| 22 | Check the cable between HP Sensor, Cap and Main Board Visually check the cable between HP Sensor, Cap and Main Board, reconnect the cable if there is any half-insertion or disconnection. Is the trouble phenomenon still occurring? |
Go to step 23 | End |
| 23 | Check the cables between the Cap Drive Motor and MCU board Visually check the cables between the Cap Drive Motor and the MCU board, and if there are any cables that are not fully inserted in the connector or disconnected, reconnect them. Is the trouble phenomenon still occurring? |
Go to step 24 | End |
| 24 | Replacement of the HP Sensor, Cap Replace the HP Sensor, Cap. Is the trouble phenomenon still occurring? |
Go to step 25 | End |
| 25 | Replace the Cap Drive Motor Replace the Cap Drive Motor. Is the trouble phenomenon still occurring? |
Contact EPSON Local Service Representatives | End |