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
An abnormal load was suddenly applied to the motor, 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
Gears are locked due to foreign object
Gear trains are damaged or locked by foreign object
Mechanical Controller 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. |
Go to step 2 | End |
| 2 | Check the Head Unit for installation Is the Head Unit installed properly? Remove and reinstall it if necessary. Does the error still occur? |
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. Does the error still occur? |
Go to step 4 | End |
| 4 | Check the screws for the Head Unit Are the four screws for the Head Unit properly attached? Remove and reinstall it if necessary. Does the error still occur? |
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. Does the error still occur? |
Go to step 6 | End |
| 6 | Check the Head HP Sensor for installation Is the Head HP Sensor installed properly? Remove and reinstall it if necessary. Does the error still occur? |
Go to step 7 | End |
| 7 | Cap transport fixture Has the cap transport fixture been removed? Remove and store it if necessary. Does the error still occur? |
Go to step 8 | End |
| 8 | Check the cap carriage for installation Is the cap carriage installed properly? Remove and reinstall it if necessary. Does the error still occur? |
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. Does the error still occur? |
Go to step 10 | End |
| 10 | Check the screws for the Cap Unit Are the three screws for the Cap Unit properly attached? Remove and reinstall it if necessary. Does the error still occur? |
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. Does the error still occur? |
Go to step 12 | End |
| 12 | Check the Cap HP Sensor for installation Is the Cap HP Sensor installed properly? Remove and reinstall it if necessary. Does the error still occur? |
Go to step 13 | End |
| 13 | Check for foreign objects Check for foreign objects on the path of the head movement in the head motion unit. Remove any foreign objects. Is the path free from foreign objects? |
Go to step 14 | End |
| 14 | Check the gear trains for damage Visually check the gear trains of the head motion mechanism for foreign objects, falling off or damage, and reassemble if necessary. Does the error still occur? |
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. Does the error still occur? |
Go to step 16 | End |
| 16 | Check the cables between the Head Drive Motor and mechanical control board Visually check the cables between the Head Drive Motor and the mechanical control board, and if there are any cables that are not fully inserted in the connector or disconnected, reconnect them. Does the error still occur? |
Go to step 17 | End |
| 17 | Replace the Head HP Sensor Replace the Head HP Sensor. Does the error still occur? |
Go to step 18 | End |
| 18 | Replace the Head Drive Motor Replace the Head Drive Motor. Does the error still occur? |
Go to step 19 | End |
| 19 | Replace the suspected part Replace in order of Mechanical Controller Board, Main Board and Power Supply Unit Does the error still occur? |
Go to step 20 | End |
| 20 | Check for foreign objects Check for foreign objects on the path of the cap movement in the cap motion unit. Remove any foreign objects. Is the path free from foreign objects? |
Go to step 21 | End |
| 21 | Check the gear trains for damage Visually check the rotating component parts of Cap Motion mechanism missing or damages, and reassemble if necessary. Does the error still occur? |
Go to step 22 | End |
| 22 | Check the cables between the Cap HP Sensor 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. Does the error still occur? |
Go to step 23 | End |
| 23 | Check the cables between the Cap Drive Motor and mechanical control board Visually check the cables between the Cap Drive Motor and the mechanical control board, and if there are any cables that are not fully inserted in the connector or disconnected, reconnect them. Does the error still occur? |
Go to step 24 | End |
| 24 | Replace the Cap HP Sensor Replace the HP Sensor, Cap. Does the error still occur? |
Go to step 25 | End |
| 25 | Replace the Cap Drive Motor Replace the Cap Drive Motor. Does the error still occur? |
Contact Epson local service representatives. | End |