Startup Process After Long-Term Shutdown - Hitachi UX Twin-Nozzle Technical Manual

6.15.2 Startup process after long-term shutdown

[Overview]
● This operation is the work for draining the makeup which cleaned the ink circulation system at "Process prior
to long-term shutdown" and the work for refilling it with the ink.
● To completely drain the makeup from the circulation system, you should charge the circulation system with
the ink, drain the ink, and refill the ink into the system.
● To secure safety, conduct "
Make sure to conduct "
If the printer does not operate normally after operation check, a special work is
required for restoration. Contact your local distributor. Should the circulation system
be operated continuously before normal operation is confirmed, the pressure in the
recovery line would be increased and it is going to be dangerous. There is a possibility
that the ink is ejected from the nozzle strongly or the ink is reversely ejected from the
gutter strongly. In such case, stop the operation immediately and contact the local dis-
Procedure of the operation check
1
● Wear protective gear (goggles and mask).
● If the ink or makeup gets in your eyes or mouth, immediately rinse with warm water
and consult a doctor.
● Perform work after confirming that there is no one in the ink ejection direction.
(Perform this work by inserting the print head tip into a beaker, etc.)
(a) Remove the nozzle rubber seal.
(b) Press "Solenoid valve/pump test" on Circulation maintenance screen to confirm
that each valve of MV1 to MV9, MV23, MV25, MV28 and MV29 operates normally.
Refer to Technical manual "6.13 Test of solenoid valve/pump" for detail.
(It is operating normally if the solenoid valve gives out the operation sound.)
The solenoid valve maybe firmly fixed if the operational sound is not heard.
For restoration, a special work is required. Contact your local distributor.
(c) Open the "Circulation control" screen, and press the Ink stream 1 alignment key
and then the Start/Continue key.
● Check if the ink stream is going into the gutter and it's in the center of the gutter.
● Check whether the gutter absorbs the liquid.
If the ink is not being ejected, press Ink stream 1 alignment key again. An ink fixing may
be caused if the ink is not ejected after Ink stream 1 alignment is conducted two times.
An ink fixing may be caused if the suction of the liquid is not confirmed.
A special work is required for restoration. Contact your local distributor.
If the "Ink steam bending" occurs, refer to Technical manual "6.4 How to correct ink
stream bending and nozzle clogging" for restoration. If the ink stream bending is not
corrected, a special work is required. Contact your local distributor.
1 Operation check" before "Startup after long-term shutdown".
CAUTION
1 Operation check" before "Startup after long-term shutdown".
WARNING
CAUTION
CAUTION
●Long-term Shutdown 6-44