Icon/Name

Reason

Causes

Action

Charge
Fault

Drops cannot be charged correctly

Dirty head

1. Clean and dry printhead

Modulation incorrect

1. Adjust as required ,refer to “Drops Observation” on Operation Manual.

The ink stream is misaligned

1. Perform a nozzle flush and nozzle wash.
2. Disable the CHARGE FAULT SHUTDOWN and GUTTER FAULT SHUTDOWN in SETTINGS menu and restart the inkjet.
3. If the ink stream is still misaligned, perform ink stream alignment.

Parameters setting faulty

Default key parameters for 70/60/50/40 models:

1. Running Pressure 290 / 330 / 360 / 390
2. Charge Value 150 / 150 / 150 / 110
3. Phase Charge Value 120 / 120 / 120 / 160
4. Phase Offset 9 / 9 / 9 / 9

Viscosity incorrect

1. Refer to the 3.7.10 Warning Icons - Viscosity Faulty section for possible causes and remedial action.

Ink was contaminated

1. The printer has not been serviced for a long time or the wrong ink or makeup has been added.
2. Clean ink system and renew ink.

Abnormal running pressure

1. Observe if the running pressure matches the set value.
2. If necessary, maintain the printer and replace the filter, which can be determined by the specific running hours.

Faulty nozzle assembly or modulation circuitry

1. Check the connections of nozzle, the state of the drops is used as a reference to determine whether the nozzle is in good condition.
2. Replace Nozzle if nothing wrong with connections of nozzle

Charge electrode or circuitry fault

1. Disable the CHARGE FAULT SHUTDOWN and GUTTER FAULT SHUTDOWN in SETTINGS menu and restart the jet.
2. Run the printer and test print, if nothing printed and keeping charge error, then check the connections from the board side to the Charge electrode.
3. Replace the mainboard if nothing wrong with connections of Charge electrode.

Phase detector or circuitry fault

1. Disable the CHARGE FAULT SHUTDOWN and GUTTER FAULT SHUTDOWN in SETTINGS menu and restart the jet.
2. Run the printer and test print, If the printing is normal but the Charge fault persists, please first check the distance from the phase detector to the ink stream (about 1mm), and then check the continuity of the phase detection cable.
3. Replace the mainboard if nothing wrong with connections of phase detector or phase amplifier.

1. Observe if the printhead temperature is normal in RUNNING INFO screen.
2. Check the heater connections, Replace Heater Assembly(Refer to 1.2.7 Heater Assembly) or Mainboard if the Head Temperature incorrect.
3. If the connection is normal and the associated output is normal, replace the heater assembly.

Icon/Name

Reason

Causes

Action

Gutter
Fault

Inkjet is on, but ink stream is not detected in the gutter

Nozzle is clogged

1. Perform a nozzle flush and a wash nozzle.
2. Restart the inkjet and make sure that the ink stream is entering the gutter.

Ink stream is misaligned

1. Perform a nozzle flush.
2. Disable the CHARGE FAULT SHUTDOWN and GUTTER FAULT SHUTDOWN in SETTINGS menu and restart the inkjet.
3. Restart the inkjet and make sure that the ink stream is entering the gutter.
4. Perform an ink stream alignment (Refer to “Ink Jet Alignment” in Operation manual ).

Tube or valve clogged

1. Check if the tube from the manifold on the back of the ink core(item 1 in 1.3.24 Ink Core Manifold) to the gutter tube on the print head ( item 16 in 1.2 Printhead Overview ) is blocked.
2. Clean V8

No vacuum

1. Turn on Pump and Valve 8 to check the vacuum for DC-260T/250T/240T.
2. Turn on Gutter Pump and Valve 8 to check the vacuum for DC-60T .

The gutter sense is defective

1. Stop jet and turn off the printer.
2. Remove the upper cover sealing, loosen the print module base set screw x6 and the heater set screw x4 (refer to 1.2 Printhead Overview) and check if the cable from the gutter detection( Item 2 and 3 in 1.2.1 Printhead Base ) to the mainboard side (refer to pinout of J10) is normal.
3. Repair the cable according to site conditions.

Mainboard Faulty

1. Short-circuit detection signal on the mainboard (3rd and 4th pin on J10 in page 47) to determine whether the mainboard is faulty.

Icon/Name

Reason

Causes

Action

Print Head

Cover Open

Lid switch circuit is open

The printhead cover is removed or not seated correctly

1. Install the printhead cover.
2. Make sure the printhead cover is completely seated on the printhead - slide the printhead completely into the sleeve.

Missing Magnet

1. Make sure the magnet is there in front of the printhead sleeve.

Defective lid switch

1. Stop the inkjet and turn off the printer.
2. Remove the print module base and inspect the lid switch (Position 4 in 1.2.1 Printhead base ).
3. Replace if lid switch faulty.

Open circuit

1. Inspect the cabling from the lid switch to the mainboard. (Refer to 1.2.18 Lid Switch).

Defective mainboard

1. Replace mainboard if faulty.

Icon/Name

Reason

Causes

Action

EHT Leak Error

Excessive current in the EHT circuit as measured or a mutation detected by mainboard

Grounding anomaly

1. Check and ensure that there is no abnormality in grounding connection, do not connect the printer directly with the large equipment at the filed site.

2. Check and ensure that the power supply is well grounded.

Dirty or wet printhead

1. In the shutdown state, scrub the area near the deflection plate with a cotton swab dipped in cleaning agent and dry with the standard blow-up balloon.

2. A multimeter can be used to measure the resistance of the positive and negative plates, which is generally greater than 180 megohms.

EHT trip value too low

1. Version 1: Reset the EHT Trip level to 200. ( A maximum value of 150 exists in some software versions, this option is not available for versions in EHT calibration mode.)

2. Version 2: Reset the EHT Trip level to 3 (For EHT Calibration Mode).

EHT output too high

1. Modify EHT Range Set, default range is 150-220, it can be appropriately reduced. For example: 130-200.

Defective EHT module

1. Replace the EHT module

Mainboard faulty

1. Confirm mainboard status and version information with service engineer.
2. Replace the mainboard

Short in umbilical or EHT resistor

1. Stop the inkjet and turn off the printer.

2. Unplug the EHT wire from the EHT power supply.

3. Measure the resistance between the EHT wire and the EHT plate (22 mega-ohms).Note: Not all meters can measure high resistance, use parallel resistor to calculate resistance.

4. If open or short circuit exists, remove the printhead engine and inspect the EHT resistor.

5. Replace the umbilical.

Inaccurate EHT calibration

1. After cleaning and drying the printheads, perform the EHT calibration operation again.

There are 2 versions of EHT leak related software:

1. EHT Trip Level + EHT Calibration, "1, 2, 3" leakages can be set and the EHT standard values can be recalibrated, the printhead can be tested on its own if there is an abnormal environment, and a "EHT Calibration" warning will appear on the screen, available on the full range of DuraCode Touchscreen models from December 1, 2020.

2. EHT Trip Level only, maximum value can be set to 150 or 200.

Icon/Name

Reason

Causes

Action

Make-Up Cartridge
cannot be read

Ink Cartridge
cannot be read

Ink or Makeup Cartridges cannot be detected

No ink/solvent cartridges plugged

1. Insert an ink cartri

The ink or Makeup cartridge is empty

1. Remove the empty cartridge and insert a new ink cartridge.

Ink or Makeup Chip Expired (For DC-60T)

1. Replace new ink or makeup cartridges

The printer is unable to read the ink or makeup cartridge chip

1. Make sure that the ink or makeup cartridge is installed correctly and locked into the holder.

2. Remove the ink or makeup cartridge, check if the chip is present and is clean.

3. If another ink or makeup cartridge is available, insert it into the printer and see if the printer can read its chip.

4. Check if the chip reader (inside the receptacle) is positioned correctly and is clean.

Cable between chips detector and mainboard disconnected or faulty

1. Check Chips Detection Cable for continuity.

2. Fix or replace if faulty

Mainboard faulty

1. Replace the mainboard

Icon/Name

Reason

Causes

Action

EHT Calibration

System detects the EHT requires calibration

Wetter printhead compared to last calibration

1. Clean and dry the head normally then perform an EHT Calibration.

Stubborn stains on the print module base resulting in a constant slight discharge of high voltage

1. In the shutdown state, gently scrub the area near the deflection plate with a cotton swab dipped in cleaning agent and dry with the standard blow-up balloon.

2. A multimeter can be used to measure the resistance of the positive and negative plates, which is generally greater than 180 megohms.

3. Perform an EHT Calibration again after action 1 and 2

EHT calibration failure

1. During EHT calibration, the printhead cover is opened, make sure that the cover is locked, and then calibrate again.

2. The printhead was too dirty during calibration, clean and dry the printhead and calibrate again.

3. EHT cable is shorted or disconnected, check the EHT cable (main board - EHT module - EHT output connector - EHT resistor - Deflection plate), make sure there is no error and then calibrate again.

Mainboard faulty

1. EHT Date saving or detection circuit failure, replace the mainboard.

Note: The EHT calibration feature is only available on machines manufactured after Nov 1, 2020.

Icon/Name

Reason

Causes

Action

Viscosity fault

5 points or more difference between the actual viscosity and the target viscosity

Makeup cartridge is empty but the printer is continuously running

1. Replace new makeup cartridge.

2. Keep the printer running and observe if the viscosity drops normally (Above 10 minutes).

Makeup 0% warning due to ink system faulty

1. Troubleshooting the Makeup Cartridge Empty issue according 3.7.9 Warning Icons - Makeup and ink Cartridge Empty .

2. Keep the printer running and observe if the viscosity drops normally(Above 10 minutes).

Mixer Tank Full

1. Once the Mixer Tank Full warning shows on the screen, makeup will not add into the Mixer Tank anymore, need to drain the ink from the drain pipe(Position 5 on 1.3 Ink Compartment Overview).

2. It is recommended to drain the ink in the mixer tank below the OK level.

The ink is too thick or too thin.

If the ink is too thick:

1. The printer should add make-up fluid to correct the ink viscosity.

2. Monitor the progress of make-up additions using Diagnostics Screen. If the printer does not appear to be attempting to add make-up (allow at least five minutes for a make-up addition to be attempted), see causes below.

3. If make-up addition capability is confirmed but printer operations are impaired by thick ink, consider renew the ink.

If the ink is too thin: Allow the inkjet to run so that the excess make-up fluid evaporates. The following actions will help to recover the viscosity:

1. Avoid nozzle flush nozzle and improper printhead cleaning (with the vacuum applied).

2. Use the Quick Start and Quick Stop options whenever possible.

3. If printer operations are affected by thin ink, consider renew the ink.

Valve 3 faulty

1. Remove and clean V3.

2. Make sure that no ink flows to the VMS Chamber when V3 is de-energized.

3. Replace if faulty

The restrictor at the bottom of the VMS Chamber clogged

1. Open the VMS Chamber and clean the restrictor at the bottom of it.

2. Make sure that when there is liquid inside, it can be emptied.

Level detector of VMS Chamber faulty

1. Check the continuity between VMS Level Detector and Ink Core Interface Board.

2. Shorting can be used to test the fault location. Example: If the Low level cable(WHITE) is shorted to the GND(BLACK), the diagnosis screen will show the VMS Chamber Low Level as "OK".
3. Fix or replace if faulty.

The restrictor on the manifold of main filter is clogged

1. Remove the main filter.

2. Clean the ruby restrictor on the manifold.

3. Make sure that ink can flow through the ruby restrictor (Item 9 in 1.3.4 and 1.3.5 Ink Core Top view)

Mainboard faulty

1. Mainboard has no response to the level signal of VMS
2. 2. Replace if faulty

Icon/Name

Reason

Causes

Action

Mixer Tank Full

The HIGH level sensor of Mixer Tank is ON

Too much ink in the mixer tank

1. Drain the ink from the drain pipe Position 5 in 1.3 Ink Compartment Overview).
2. It is recommended to drain the ink in the mixer tank below the OK level.

Printer shaking while running

1. Make sure the printer does not shake during running.

Viscosity Calibration set to manual and large temperature difference between day and night

1. Set Viscosity Calibration mode to Auto.
2. Replace the printer installation environment to reduce the temperature difference if possible.

Level detector of Mixer tank is faulty

1. Check item 14(LVBU) in 1.3.16 Ink Core Interface Board and the item 8 in 1.3.4 and 1.3.5 Ink Core Top view for for continuity,
2. Fix or replace if faulty

Mainboard faulty

1. Remove the cable J8 from Mainboard. After removing J8 the mixer tank will show empty on the screen if the mainboard is working well.
2. Replace if faulty