Troubleshooting Manual - Alunar 3D Printer
Troubleshooting Manual Please be aware of these options as follows : 1. Mainboard is sensitive to static electricity. Please Touch a grounded object to release static electricity before operation. 2. Please ensure the power wire connection is correct. 3. Please Cut off the power when changing interface connection.
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Contents Problem Collection ................................................................................................................. 3 1. Black Screen ....................................................................................................................... 5 2. White Square ...................................................................................................................... 6 3. Temp Display: def .............................................................................................................. 6 4. Extruder Temp Doesn’t Rise ............................................................................................ 7 5. Hotbed Temp Doesn’t Rise .............................................................................................. 8 6. Motor Issue ......................................................................................................................... 8 7. Limited Switch Issue .......................................................................................................... 9 8. SD Card Issue .................................................................................................................. 10 9. Online Printing Issue ....................................................................................................... 10 10. Extruder/Hotbed Temp Inconsistent ........................................................................... 12 11. Extruder / Hotbed Temp Keeps Rising After the Boot .............................................. 13
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Problem Collection
1.Black Screen
2.White Square
3.Temp Display: def
4.Extruder Temp Doesn’t Rise
5.Hotbed Temp Doesn’t Rise
6.Motor Issue
7.Limited Switch Issue
8.SD Card Issue
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10. Extruder / Hotbed Temp 9.Online Pringting Issue
Inconsistent with Display
11.Extruder / Hotbed Temp Keeps Rising After the Boot
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1. Black Screen Step 1 . Check Power Supply
AC 110V/220V
Power Indicator
Voltage Selection
a. Check the power indicator, if the light is on , move to Step 2 ; b. If the light is off, check the wire connection & voltage selection if they are correct ; c .If the light is off and they are correct, you need to replace a power supply.
Step 2 . Check Mainboard a. Check if the 40X40 Fan is running. If not, please check the wire connection between power & mainboard is correct and the wire is not loose; b. Click Reset Button on the mainboard , check D1 indicator : - If D1 lights on for a second then went out and screen is black, try to reconnect screen wire for several times , if still not working , you need to replace a screen. - If D1 indicator is always off and screen is black you need to replace a mainboard.
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2. White Square Step 1 . Check Mainboard
a. Click Reset button, check D1 indicator: - If D1 lights on for a second then went out and screen is full of white square, try to reconnect screen wire for several times .when it’s well connected , click Reset button.If still not working , you need to replace a screen. - If D1 indicator is always off and screen is full of white square, you need to replace a mainboard.
3. Temp Display: def Step 1 . Click Reset , check screen
Click Reset and check screen. The temp will turn to def in a second . As showed above , the extruder temp is -50.9 , means thermistor cannot detect temp.
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Step 2 . Change wires of E_T , B_T port and click Reset , check screen
If Step 1 & 2 both shows abnormal extruder temp , you need to replace extruder thermistor; If Step 1 & 2 both shows abnormal hotbed temp, you need to replace hotbed thermistor; If Step 1 shows abnormal extruder temp while Step 2 shows abnormal hotbed temp , or Step 2 shows abnormal extruder temp while Step 1 shows abnormal hotbed temp, you need to replace mainboard.
4. Extruder Temp Doesn’t Rise Step 1 . Check Mainboard Step 2 . Check Extruder
a. Screen Operation Quick Settings → Preheat PLA The screen will show the extruder is preheating. b. If D5 indicator doesn’t light on , you need to replace mainboard .
D5
c.If D5 indicator lights on , please check End port connection . If the connection is good , you need to replace extruder heating pipe.
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5. Hotbed Temp Doesn’t Rise Step 1 . Check Screen Operation Step 2 . Check hotbed connection
a. Screen Operation Quick Settings → Preheat PLA
D4
b. Check D4 indicator .If the it doesn’t light on , you need to replace a mainboard; if D4 indicator lights on , please check BED port connection . If no connection problem , you need to replace a hotbed.
6. Motor Issue Step 1 . Motor Test
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Example: Before exchange , X Pos.Fast ,X motor is abnormal . Y Pos.Fast, Y motor is good. Change X, Y motor connection , X Pos.Fast, Y motor is abnormal. Y Pos.Fast, X motor is good. You need to replace a mainboard; or X Pos.Fast , Y motor is good. Y Pos.Fast, X motor is abnormal, you need to replace X motor.
7. Limited Switch Issue Step 1 . Limited Switch Test Example: X Limited Switch Testing
Before Clicking Limited Switch
After
Clicking
Limited Switch
Before Exchange: Choose X Pos.Fast , test X Limited Switch: Abnormal; Choose Y Pos.Fast , test Y Limited Switch: Normal Y_Stop
X_Stop After Exchange: If Choose X Pos.Fast , test Y Limited Switch: Abnormal; Choose Y Pos.Fast , test X Limited Switch: Normal. You need to replace a mainboard. If Choose X Pos.Fast , test Y Limited Switch: Normal; Choose Y Pos.Fast , test X Limited Switch: Abnormal.You need to replace a limited switch. You can use same method to test other limited swtich.
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8. SD Card Issue FAQ: No “Print file” Option When SD is correctly installed Step 1 . Test SD card if it can be recognized by PC and store files. Step 2 . Reinstall SD card for several times to ensure SD card is correctly installed.
If PC can’t recognize SD card , you need to replace a SD card;If PC can recognize SD card and you can store files in SD card, move to Step 2 . If there is still no “Print file” Option , you need to replace a mainboard.
If the SD card & Hotbed is good , there’ll be “Print file” Option
9. Online Printing Issue Please ensure the printer can use SD card to offline printing and all functions are OK. Question 1 : repetier fail to connect Step 1 . Check on PC if it can find CH340G
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Check on PC if there is USB SERIAL . If not , please find the file in SD card and install it .
Question 2 : repetier connected , but fail to control the printer Step 1 . Confirm repetier is correctly set
It depends on CH340G code
Open repetier , open “Printing seting” , the correct setting is info above.
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Step 2 . Open Toggle Log to check if there is any problem
Open the option below to record.
Check the info if it’s normal . If not , you need to replace a mainboard.
10. Extruder/Hotbed Temp Inconsistent Step 1 . Thermistor test
Extruder Temp
Hotbed Temp
As showed in the picture , the extruder & hotbed temp should be consistent with indoor temp , but now the extruder temp is 175℃.
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Step 2 . Change wires of E_T , B_T port and click Reset , check screen
If it shows abnormal extruder temp , you need to replace extruder thermistor; If it shows abnormal hotbed temp, you need to replace mainboard. (If the hotbed temp is abnormal, please do test refer to methods above)
11. Extruder / Hotbed Temp Keeps Rising After the Boot Question: The extruder / hotbed temp keeps rising after booting with no operation Step 1 . Extruder temp check
Check D5 indicator , if it’s on , D5
turn off the printer and restart , if D5 indicator is still on , you need to replace a mainboard.
Step 2 . Hotbed temp check
Check D4 indicator , if it’s on , turn off the printer and restart , if D4
D4 indicator is still on , you need to replace a mainboard.
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Contents Problem Collection ................................................................................................................. 3 1. Black Screen ....................................................................................................................... 5 2. White Square ...................................................................................................................... 6 3. Temp Display: def .............................................................................................................. 6 4. Extruder Temp Doesn’t Rise ............................................................................................ 7 5. Hotbed Temp Doesn’t Rise .............................................................................................. 8 6. Motor Issue ......................................................................................................................... 8 7. Limited Switch Issue .......................................................................................................... 9 8. SD Card Issue .................................................................................................................. 10 9. Online Printing Issue ....................................................................................................... 10 10. Extruder/Hotbed Temp Inconsistent ........................................................................... 12 11. Extruder / Hotbed Temp Keeps Rising After the Boot .............................................. 13
2
Problem Collection
1.Black Screen
2.White Square
3.Temp Display: def
4.Extruder Temp Doesn’t Rise
5.Hotbed Temp Doesn’t Rise
6.Motor Issue
7.Limited Switch Issue
8.SD Card Issue
3
10. Extruder / Hotbed Temp 9.Online Pringting Issue
Inconsistent with Display
11.Extruder / Hotbed Temp Keeps Rising After the Boot
4
1. Black Screen Step 1 . Check Power Supply
AC 110V/220V
Power Indicator
Voltage Selection
a. Check the power indicator, if the light is on , move to Step 2 ; b. If the light is off, check the wire connection & voltage selection if they are correct ; c .If the light is off and they are correct, you need to replace a power supply.
Step 2 . Check Mainboard a. Check if the 40X40 Fan is running. If not, please check the wire connection between power & mainboard is correct and the wire is not loose; b. Click Reset Button on the mainboard , check D1 indicator : - If D1 lights on for a second then went out and screen is black, try to reconnect screen wire for several times , if still not working , you need to replace a screen. - If D1 indicator is always off and screen is black you need to replace a mainboard.
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2. White Square Step 1 . Check Mainboard
a. Click Reset button, check D1 indicator: - If D1 lights on for a second then went out and screen is full of white square, try to reconnect screen wire for several times .when it’s well connected , click Reset button.If still not working , you need to replace a screen. - If D1 indicator is always off and screen is full of white square, you need to replace a mainboard.
3. Temp Display: def Step 1 . Click Reset , check screen
Click Reset and check screen. The temp will turn to def in a second . As showed above , the extruder temp is -50.9 , means thermistor cannot detect temp.
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Step 2 . Change wires of E_T , B_T port and click Reset , check screen
If Step 1 & 2 both shows abnormal extruder temp , you need to replace extruder thermistor; If Step 1 & 2 both shows abnormal hotbed temp, you need to replace hotbed thermistor; If Step 1 shows abnormal extruder temp while Step 2 shows abnormal hotbed temp , or Step 2 shows abnormal extruder temp while Step 1 shows abnormal hotbed temp, you need to replace mainboard.
4. Extruder Temp Doesn’t Rise Step 1 . Check Mainboard Step 2 . Check Extruder
a. Screen Operation Quick Settings → Preheat PLA The screen will show the extruder is preheating. b. If D5 indicator doesn’t light on , you need to replace mainboard .
D5
c.If D5 indicator lights on , please check End port connection . If the connection is good , you need to replace extruder heating pipe.
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5. Hotbed Temp Doesn’t Rise Step 1 . Check Screen Operation Step 2 . Check hotbed connection
a. Screen Operation Quick Settings → Preheat PLA
D4
b. Check D4 indicator .If the it doesn’t light on , you need to replace a mainboard; if D4 indicator lights on , please check BED port connection . If no connection problem , you need to replace a hotbed.
6. Motor Issue Step 1 . Motor Test
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Example: Before exchange , X Pos.Fast ,X motor is abnormal . Y Pos.Fast, Y motor is good. Change X, Y motor connection , X Pos.Fast, Y motor is abnormal. Y Pos.Fast, X motor is good. You need to replace a mainboard; or X Pos.Fast , Y motor is good. Y Pos.Fast, X motor is abnormal, you need to replace X motor.
7. Limited Switch Issue Step 1 . Limited Switch Test Example: X Limited Switch Testing
Before Clicking Limited Switch
After
Clicking
Limited Switch
Before Exchange: Choose X Pos.Fast , test X Limited Switch: Abnormal; Choose Y Pos.Fast , test Y Limited Switch: Normal Y_Stop
X_Stop After Exchange: If Choose X Pos.Fast , test Y Limited Switch: Abnormal; Choose Y Pos.Fast , test X Limited Switch: Normal. You need to replace a mainboard. If Choose X Pos.Fast , test Y Limited Switch: Normal; Choose Y Pos.Fast , test X Limited Switch: Abnormal.You need to replace a limited switch. You can use same method to test other limited swtich.
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8. SD Card Issue FAQ: No “Print file” Option When SD is correctly installed Step 1 . Test SD card if it can be recognized by PC and store files. Step 2 . Reinstall SD card for several times to ensure SD card is correctly installed.
If PC can’t recognize SD card , you need to replace a SD card;If PC can recognize SD card and you can store files in SD card, move to Step 2 . If there is still no “Print file” Option , you need to replace a mainboard.
If the SD card & Hotbed is good , there’ll be “Print file” Option
9. Online Printing Issue Please ensure the printer can use SD card to offline printing and all functions are OK. Question 1 : repetier fail to connect Step 1 . Check on PC if it can find CH340G
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Check on PC if there is USB SERIAL . If not , please find the file in SD card and install it .
Question 2 : repetier connected , but fail to control the printer Step 1 . Confirm repetier is correctly set
It depends on CH340G code
Open repetier , open “Printing seting” , the correct setting is info above.
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Step 2 . Open Toggle Log to check if there is any problem
Open the option below to record.
Check the info if it’s normal . If not , you need to replace a mainboard.
10. Extruder/Hotbed Temp Inconsistent Step 1 . Thermistor test
Extruder Temp
Hotbed Temp
As showed in the picture , the extruder & hotbed temp should be consistent with indoor temp , but now the extruder temp is 175℃.
12
Step 2 . Change wires of E_T , B_T port and click Reset , check screen
If it shows abnormal extruder temp , you need to replace extruder thermistor; If it shows abnormal hotbed temp, you need to replace mainboard. (If the hotbed temp is abnormal, please do test refer to methods above)
11. Extruder / Hotbed Temp Keeps Rising After the Boot Question: The extruder / hotbed temp keeps rising after booting with no operation Step 1 . Extruder temp check
Check D5 indicator , if it’s on , D5
turn off the printer and restart , if D5 indicator is still on , you need to replace a mainboard.
Step 2 . Hotbed temp check
Check D4 indicator , if it’s on , turn off the printer and restart , if D4
D4 indicator is still on , you need to replace a mainboard.
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