1) After turning on the printer, carriage move back to home normally. The interface of printmon becomes grey:
a) Check whether the driver is installed properly. "EPOWER USB DEVICES" should be shown in the device manager.
b) Check whether the USB cable is defective, or connected improperly.
c) Check whether the main board is defective

2) Carriage is not moving after turning on the printer:
a) Check whether the 12V LED on the connecting board and D4 LED on the main board are lit on. If those LED are not lit on, check the 12V input.
b) Check whether the home sensor is defective, or connected improperly.
c) Check whether the 40P connector on the connecting board and the main board is plugged in properly, or defective.
d) Check whether the signal cable of the x motor driver is plugged in properly, or defective.
e) Check the connection between the x motor and the encoder

3) Carriage is moving to opposite direction after turning on the printer:
a) Check whether the signal cable of the x motor driver is plugged in properly, or defective.
b) Check the connection between the x motor and the encoder.

4) Ink pump keep working:
a) Check whether the floating sensor in the subtank is working properly.
b) Check whether the connection of the 18P flat cable between the connecting board and the printhead board.
c) Check whether the corresponding LED for this specific color pump is on. If the LED is on, please change the connecting board.

5) Pump is not working, and the alarm is ON:
a) Check whether the 24V power supply is normal.
b) Check whether the pump is working properly.
c) Check whether the connection of the 18P flat cable between the connecting board and the printhead board.
d) Check whether the floating sensor in the subtank is working properly.
e) Check whether the corresponding LED for this specific color pump is on. If the LED is on, please change the connecting board.

6) Flash jetting is normal when turning on. After printing for a while, does not flash jetting, but printing normally:
a) Check whether the encoder is clean, or scratched, or not installed properly.
b) The config file is lost. Recalculate the machine length.

7) The interface of the software becomes grey. The movement cannot be controlled. Extra solid color is printed:
Check whether the USB cable is loosened or defective. (Recommended to use the cable with better anti-interruption)

8) Positioning error during printing:
a) Check whether the 12V is normal
b) Check whether the X motor belt and the gear is loosened or damaged.
c) Check the X motor
d) Check whether the encoder is dirty or scratched.
e) Check whether the encoder sensor is dirty or defective
f) Check the connection of the 18P and 16P flat cable between the connecting board and the printhead board.(Keep a distance from strong magnetic field. Prevent using instable input power. Equip a UPS and stabilizer)

9) Interruption during printing:
a) Check whether 12v is normal.
b) Check the connection of the 14P flat cable between the connecting board and the printhead board.
c) Check the connection of the cable from DB15 on the connecting board to the servo driver.
d) Check whether the USB cable is normal.
e) Check whether the grounding is well.

10) Reset to home is normal. Carriage is moving, but not printing:
a) Check the connection of the wire for the encoder.
b) Check the connection of the cable from DB15 on the connecting board to the X servo driver.

11) Interruption when printing the printhead status. Ink jetting on the printing platform when calculating the machine length:
a) Check whether the encoder sensor is connected properly.
b) Check the connection of the 18P flat cable.

12) There is vertical banding during printing
Stop printing and clean the carriage bearing and steel rail. If the problem still exist, please contact the local engineer.