Flora Digital Printing System
Model LJ320P
Copyright 2011@ Shenzhen Runtianzhi Image Technology Co.,Ltd. By Victor Xu
~ 67 ~
Appendix A Troubleshooting Guide
Problems
Probable Causes
Solution
One particular color is not
printing
o
No ink flowing to the tube line
of the Print head Carriage
o
Empty ink supply in the Ink
barrel
o
Clogged Ink line tubing and ink
filter
o
Defective Ink Pump
o
Defective Print head Control
Board
o
Defective Motion Control Board
•
Fill-up empty ink barrel
•
Replace clogged ink line tubing and ink filter
•
Replace defective Ink Pump
•
Replace defective Print head Control Board
•
Replace defective Motion Control Board
Some Print head Nozzles
are not firing
Print head firing is not
straight
o
Clogged Print head
o
Print head problems
o
Defective Print head Cable
o
Defective Print head Control
Board
•
Perform solvent flushing and Ink Priming
(make a longer flushing if needed)
•
Replace defective Print head
•
Replace defective Print head Cable
•
Replace defective Print head Control Board
•
Adjust the Print head Voltage
Ink Starvation
o
Insufficient Negative Pressure
value
o
Print head nozzles are not
working well
o
Insufficient ink flowing from
the Disc Filter to the Print head
because of clogged disk filter
Increase the Negative Pressure value from
-1.8KPa to -2.1KPa
Perform Test Print to check if all the Print head
nozzles are working well, flush and ink prime
as needed
Replace Filter
Cannot achieve correct
negative pressure
Negative pressure keeps
on changing from time to
time
o
Presence of ink in the Ink
Protect Tank
o
Defective Negative Pressure
Regulator
o
Defective Pressure Gauge
o
Defective Air Pump
o
Possible leak in the vacuum line
system (negative pressure line)
Remove or purge any presence of ink in the Ink
Protect Tank
Replace defective Negative Pressure Regulator
Replace Pressure Gauge
Replace Air Pump
Fix any air leak from the vacuum line system.
Replace Air Fittings if necessary
Air Pump is not working
Ink Pumps are not
working
o
Presence of ink in the Ink
Protect Tank
o
Ink Tank Sensor might not be
working that is why ink is
overflowing to the Ink Protect
Tank.
Fix/replace the Ink Tank Sensor
Remove the ink from the Ink Protect Tank
using the Syringe from the Ink Outlet Tube
vent
