C1 / C1 Pro - KoolStone Rock Tumbler

Troubleshooting – C1 / C1 Pro Rock Tumbler

If your tumbler fails to operate correctly, check the following table. You can search for related questions using keywords in the search box on the right side, such as: barrel, belt, stop, slow, leak, shuts down, etc.

If you need assistance, please contact KoolStone Customer Service: support@ikoolstone.com.

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No.	SYMPTOM	THINGS TO CHECK	SOLUTION
1	The unit was working, but suddenly stopped. The numbers will not light up, and the pulley won't turn.	i. Check that the adapter is well connected and working properly; *ii.* Check that the socket is energized; *iii.* Remove the barrel and repeat turn the machine on and off a few times to check if the problem persists.	If the problem persists, please contact our customer service.
2	After running for a period of time, it stops working and the light blinks, the barrel does not turn.	n/a	Please contact our customer service.
3	Automatically shuts down before the set time and cannot be turned back on after shutdown.	n/a	Please contact our customer service.
4	It shuts down automatically before the set time, and after shutting down, it can be rebooted and run, but it still shuts down automatically before the set time.	n/a	Please contact our customer service.
5	Tumbler keeps stopping	n/a	Please contact our customer service.
6	Does not polish to a shiny finish	n/a	Please refer to our article
7	Barrel leaks	i. Check if the hand-tightened knot is loose; *ii.* Check if the barrel lid is tightly screwed on and level with the barrel body, without significant tilting; *iii.* Check if the metal threaded column is loose; *iv.* Check if the metal cover or barrel is deformed.	i. Ensure that the hand-tightened knot is securely fastened to the barrel lid. *ii.* Make sure the barrel lid is securely fastened and positioned level to avoid leaks. *iii.* Ensure that the metal threaded column is securely fastened. If it is found to be loose, please contact customer service for a replacement. *iv.* Inspect the metal cover or barrel for any deformation. If it is found to be deformed, please contact customer service for a replacement.
8	Missing parts	Confirm which part is missing	Please contact our customer service.
9	Black debris /Rubber powder coming off of the barrel.	n/a	When the rubber barrel rolls, there will be a difference in air pressure inside and outside the barrel, which will cause the rubber barrel to move toward the bottom, thus causing the bottom of the rubber barrel to rub against the shell. A small amount of powder is normal; just be sure to clean it. If the situation is more serious and affects normal use, please contact our customer service for assistance.
10	Takes too long to polish.	n/a	The stone polishing process that nature takes hundreds to thousands of years to complete can be easily accomplished at home in just a few weeks, which is quite impressive. Rock tumbling is a captivating fusion of science, artistry, and dedication. Embrace the process, experiment with various stones, and savor the transformation from rough rocks to gleaming treasures. Whether it takes a few weeks or a couple of months, the art of rock tumbling teaches us patience and reveals the remarkable potential hidden within nature's wonders. So, embark on this timeless adventure, and let your stones shine brighter than ever before!
11	Belts keep breaking	i. Check if the large and small belt drive pulleys are rotating on the same vertical line without any misalignment. ii. Replace with a different belt to see if the same issue occurs.	i. Adjust the large and small belt drive pulleys to align on the same vertical line. ii. If the problem persists, please contact customer service for assistance.
12	Barrel smaller than expected	n/a	This rock tumbler is designed to polish a maximum of 2.5 pounds of stone at a time. If you need a larger capacity, you can choose our dual-barrel rock tumbler.
13	Too loud	i. Remove the barrel, turn on the machine, and check if the noise is loud without the barrel. ii. Place the barrel back on, turn on the machine, and confirm whether the noise comes from the motor or from the stones being polished inside the barrel.	i. If the noise comes from the motor, it needs to be replaced; please contact our customer service for assistance. ii. If the noise comes from the barrel, it cannot be avoided. You can try covering the entire machine with a cardboard box to reduce the noise.
14	It will turn on, but the barrel won't turn.	i. Remove the barrel and turn on the machine. a. Check if you can hear the motor running. If not, that means the motor has reached the end of its lifespan or is damaged; please contact our customer service to replace the motor. b. If you can hear the motor running, check if the large and small belt drive pulleys are missing or damaged. c. If the large and small belt drive pulleys are intact, manually rotate them to check for any noticeable resistance that makes rotation difficult. If there is resistance, please record a video and contact our customer service for assistance. ii. If everything above is fine, place the barrel back on, turn on the machine, and check if the belt is loose or slipping. If so, please change the belt or contact our customer service for assistance.	Please refer to Things to Check.
15	Barrel turns too slow.	i. Manually rotate the large and small belt drive pulleys to check for any noticeable resistance that makes rotation difficult. If there is resistance, please record a video and contact our customer service for assistance. ii. Check if the belt is loose or slipping. If so, please replace the belt or contact our customer service for assistance.	Please refer to Things to Check.
16	Cannot power on, display light is not on.	i. Check that the adapter is well connected and working properly; Ii. Check that the socket is energized.	If the problem persists, please contact our customer service.
17	Cannot power on, the light flashes once and then goes out.	Check that the adapter is well connected and working properly	If the problem persists, please contact our customer service.
18	Burning smell / Motor became detached from the frame and the shaft is loose and hanging inside.	n/a	Please contact our customer service.
19	The button is not responsive.	n/a	Please contact our customer service.
20	The barrel lid is difficult to open.	n/a	Use the included Flat-Head Screwdrive to pry it off (see the video instruction).
21	Product vibrates too much and move around.	Do not place the machine on smooth surface.	Try placing a towel under the machine.
22	Motor speed is way too fast	n/a	If the speed is too fast, you can continue to use speed 1 for grinding; speed 1 is already the lowest setting and cannot be lowered further. If you need a rock tumbler with a lower speed, you can contact our customer service.
23	Runs directly after being plugged in.	n/a	Please contact our customer service.

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