Descriptions:
The #902 error is usually caused by the environment Temp. (Room Temp.) being too high.
It can also be caused by a cooling system failure where the water is not enough or the cooling fans are not working. Please follow the steps below to determine what causes the issue.
Preparation Items:
Self-preparation :
1| Distilled water
Included in the accessory box:
2| Funnel
3| Double-head wrench
4| Torx screwdriver
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Step 0 - Use the checklist while going through the steps:
This checklist will be used to record all your taken actions in this article. After completing the checklist, please print it to save as PDF and send it to your reseller or FLUX Support if necessary.
This will be useful information for us to troubleshoot and narrow down the issue.
Please refer to the link: 5-4 #902 Overheated Checklist (HEXA)
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Step 1 - Check the Water Temp. Threshold:
This setting is to stop the machine when the set Temp. is reached. (The default is 34°C.)
(Machine > Hardware Setting > Water Temperature Threshold)
- There are two scenarios in which the machine will be stopped when a certain Temp. is reached.
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- If the set Temp. is reached (Default: 34°C), a warning will pop up, but the task won't be stopped right away. After 5 mins, if the Temp. is not lower than the set Temp., the machine will stop automatically.
- When the Temp. reaches 40°C, the machine will stop at once.
- If the set Temp. is reached (Default: 34°C), a warning will pop up, but the task won't be stopped right away. After 5 mins, if the Temp. is not lower than the set Temp., the machine will stop automatically.
- Please change the setting to 34°C if your value is lower and go to Step 2 - Check if the water is 80% full.
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Step 2 - Check if the water is 80% full:
If your machine doesn't have enough water, this may affect the flow speed to be lower.
- Open the water pump cover with the Torx screwdriver and check if the water is 80% full.
- Check if there is any leakage on the pump
Determine your result and the next action to take:
- Yes, it is 80% full (No leakage) >> Go to Step 2.1 - Test the flow speed.
- No, it is NOT 80% full (No leakage) >> Refer to the instruction to fill the water
- The water pump leaks >> Hardware issue: water pump is broken. >> Please record a video and Go to Step 7 - Report to the local reseller or FLUX Support.
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Step 2.1 - Test the flow speed:
Please perform a flow speed test and see if the value is normal.
(Machine Panel > Machine > Hardware Settings > Flow Speed Test )
Determine your result and the action to take:
-
3L/min or above >> Good value >> Go to Step 3 - Check the cooling fans.
- 0L/min ~ 2.99L/min >> Bad value >> Please refer to this article to fix the flow speed problem.
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Step 3 - Check the cooling fans:
There are three cooling fans in the machine and they are underneath the screen.
Each one of them has to be working well in order to cool the water. Please see the instructions below to check the fans.
- Turn off the machine. Remove the side casing of the HEXA. ( 8 screws )
- Two USB slots are connected to the Pi board, thus please remove these two cables first.
(Refer to the diagram if your PCB board is not the same as the photo.)
- Turn the machine and enable the cooling fans to see if they are working normally.
Determine your result and the action to take:
-
All fans are working well>> Go to Step 4 - Cool down the machine to 27°C or below.
- Not all fans are working well >> Go to Step 3.1 - Unplug and replug the cable of the flow sensor.
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Step 3.1 - Unplug and replug the cable of the flow sensor:
If the cooling fans are not all working, it could be caused by the improper connection of cables.
- Please unplug and replug the cables as instructed below.
- After replugging, enable the fans again to see if they are now working.
(Refer to Step 3)
Determine your result and the action to take:
-
All fans are working well>> Go to Step 4 - Cool down the machine to 27°C or below.
- Not all fans are working well >> Go to Step 3.2 - Reset to Factory.
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Step 3.2 - Reset to Factory
If the fans are not able to be turned on, it could be caused by firmware failure.
In order to exclude the possibility of firmware issues, please reset the machine.
-
Reset to Factory. (Machine > Reset to Factory)
- After the reset, enable the fans again to see if they are now working.
(Refer to Step 3)
Determine your result and the action to take:
-
All fans are working well>> Go to Step 4 - Cool down the machine to 27°C or below.
- At least one fan is working >> Go to Step 3.3 - Mainboard test.
- All fans are not working >> Hardware issue: Mainboard or Cooling fans >> Record a video and go to Step 7 - Report to the local reseller or FLUX Support.
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Step 3.3 - Mainboard test:
We are going to check if the mainboard's slots for the fans are all working well.
- Find the working fan's cable by unplugging the cable one by one.
- Test each slot on the mainboard.
Determine your result and the action to take:
-
All slots can turn on the fan >> Hardware issue: Cooling fans >> Record a video and go to Step 7 - Report to the local reseller or FLUX Support.
- Not all slots can turn on the fan >> Go to Step 3.4 - Cooling fans test.
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Step 3.4 - Cooling fans test:
We are going to check all cooling fans are working well by plugging them into a working slot.
- Unplug all the cables of the fans and find a working slot.
(Refer to the diagram if your PCB board is not the same as the video.)
- Once the slot is found, plug the cable of the fans one by one to test out if the fans are working.
Determine your result and the action to take:
-
All fans can be turned on by the one slot >> Hardware issue: Mainboard
>> Record a video and go to Step 7 - Report to the local reseller or FLUX Support.
- Not fans can be turned on by the one slot >> Hardware issue: Mainboard and Cooling fans >> Record a video and go to Step 7 - Report to the local reseller or FLUX Support.
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Step 4 - Cool down the machine to 27°C or below:
- Try to cool down the machine to 27°C by turning off the machine, turning on the air conditioner, fans,...etc.
- Make sure your room Temp. is lower than 27°C.
- After the step above, check the Temp. on the panel.
Determine your result and the action to take:
-
The Temp. on the panel is not the same as the room Temp. (Much higher or lower)
>> Go to Step 5 - Unplug the flow sensor and check the Temp.
- The machine's Temp. is 27°C or below and close to the room Temp. as well >> Go to Step 4.1 - Run the task where the error pops up.
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Step 4.1 - Run the task where the error pops up:
- Directly run the same task using the same parameters and settings...etc.
Determine your result and the action to take:
-
The task was finished with no errors >> Problem solved.
(Cause: Room Temp. is too high, Task time is too long, or the interval is too short between each task.)
-
The error popped up >> Go to Step 5 - Unplug the flow sensor and check the Temp.
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Step 5 - Unplug the flow sensor and check the Temp:
This step is to check if the mainboard is having an issue reading the Temp. Usually, when the flow sensor is removed from the system, the Temp. reading should be around 260-280°C.
-
Unplug the cable of the flow sensor at the back of the machine.
(The square plate has to be removed first.)
(Refer to the diagram if your PCB board is not the same as the video.)
- Go to Maintain and check the Temp.
Determine your result and the action to take:
-
The Temp. is within 260°C-280°C >> Go to Step 5.1 - Repulg the flow sensor and try to cool down the machine.
- The Temp. is NOT within 260°C-280°C >> Hardware issue: Mainboard >> Record a video and go to Step 7 - Report to the local reseller or FLUX Support
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Step 5.1 - Repulg the flow sensor and try to cool down the machine:
This step is to check if the issue was caused by the improper connection of the flow sensor.
- Replug the cable of the flow sensor. (Refer to Step 5)
(Refer to the diagram if your PCB board is not the same as the photo below.)
- After replugging, try to cool down the machine to 27°C or below.
Make sure your room Temp. is below 27°C.
Determine your result and the action to take:
-
The Temp. on the panel is not the same as the room Temp. (Much higher or lower)
>> Hardware issue: Flow sensor >> Record a video and go to Step 7 - Report to the local reseller or FLUX Support
- The machine's Temp. is 27°C or below and close to the room Temp. as well
>> Go to Step 5.2 - Run the task where the error pops up.
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Step 5.2 - Run the task where the error pops up:
- Directly run the same task using the same parameters and settings...etc.
Determine your result and the action to take:
-
The task was finished with no errors >> Problem solved.
(Cause: Improper connection of cable that caused signal of Temp. to be abnormal.)
- The error popped up >> Go to Step 6 - Reflash SD card
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Step 6 - Reflash SD card:
Sometimes, the error can be led by corrupted firmware that wasn't installed correctly or was damaged. Taking this action can exclude the possibility of firmware issues.
-
Please refer to the instructions in the link below to reflash your SD card.
[5-24 HEXA - Reflashixng SD Card]
- Go to Step 6.1 after reflashing.
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Step 6.1 - Cool down the machine and run the same task:
- After replugging, try to cool down the machine to 27°C or below.
Make sure your room Temp. is below 27°C.
- Directly run the same task using the same parameters and settings...etc.
Determine your result and the action to take:
-
The task was finished with no errors >> Problem solved.
(Cause: Firmware-related issue.)
- The error popped up >> Hardware issue: Mainboard or Flow sensor
>> Record a video and go to Step 7 - Report to the local reseller or FLUX Support
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Step 7 - Report to the local reseller or FLUX Support:
- Please follow the instructions in the link below to properly report an issue to your local reseller or FLUX support. [Contact Customer Service]
- Make sure you've completed the checklist and saved it as a PDF file so you can share your taken actions.
*The collected information such as photos or videos that show the problem of your machine in this article will be necessary to be shared with the reseller or FLUX Support.
#END
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