Preparation Items：
Self-preparation：
1｜Distilled Water
2｜Water container
3｜Cable tie
4｜Diagonal pliers
Included in the accessory box：
5｜Torx screwdriver
6｜Double head wrench
7｜Funnel
Test Items：
1. Click the “Resume” button： Try to continue working. If no error message appears again within one minute, it can be used normally.2. No folds or kinks of the water hose： If the water hose is obviously creased, press the area back to the cylinder shape > Use the cable tie to fix the position.
3. The water pump should be at least 80% full： If the water level in the water pump does not reach 80% full, Water must be added【Maintenance】 Water changing and adding. > Press the water hose to discharge the air bubbles inside the laser tube as much as possible.
4. Test the flow sensor： Test the flow speed, which should be above 3.0L/min： Machine screen > “MACHINE” > “Hardware Settings” > “Test Flow Speed.”
5. Replace the cooling Water： If you have tried steps 1 ~ 4 and still have an error, please replace the cooling water【Maintenance】 Water changing and adding. It would be helpful if you could record a video simultaneously.
a. Water hose (bending at the connection)
b. Laser tube (the number of bubbles and flowability)
c. Water pump (water volume, water pump blue light should constantly be on)
d. Flow sensor (reading), as the right figure.
3. The water pump should be at least 80% full： If the water level in the water pump does not reach 80% full, Water must be added【Maintenance】 Water changing and adding. > Press the water hose to discharge the air bubbles inside the laser tube as much as possible.
4. Test the flow sensor： Test the flow speed, which should be above 3.0L/min： Machine screen > “MACHINE” > “Hardware Settings” > “Test Flow Speed.”
5. Replace the cooling Water： If you have tried steps 1 ~ 4 and still have an error, please replace the cooling water【Maintenance】 Water changing and adding. It would be helpful if you could record a video simultaneously.
Troubleshooting Records：
1. Photo： Machine screen > “MAINTENANCE” > Turn on the “Pump” and take pictures of：a. Water hose (bending at the connection)
b. Laser tube (the number of bubbles and flowability)
c. Water pump (water volume, water pump blue light should constantly be on)
d. Flow sensor (reading), as the right figure.
2. Video： The video of cooling water replacement should include the content of photos(water hose, laser tube, water pump, flow sensor) to ensure that the above components are working properly.
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