Hitachi IJ UX, Service Manual, Page: 294 / 308

6-76
6.5.20 Startup process after long-term shutdown and How to restore
the operation
Yes
When the viscometer is working,
is Red indicator turned OFF?
No
Refer to
“4.12 Troubleshooting when Fault Occurs in Viscometer”
Viscometer verification
Restore
“Recovery line operation check”
This operation is the work for checking for ink clogging.
The operational procedure equals to operating in the sequence of Pump
→
MV3 on “Valve/Pump test”
*1)
Circulation line verification
Yes
Are the valves making
operation sound?
No
Refer to “4.5 solenoid valve replacement” and/or “5.5 Shutoff valve
(MV9) replacement” or “4.15.1 How to restore operation when solenoid
valve seizure occurs”.
Is the ink flow at tube B confirmed at
“Recovery line operation check”? *1)
Yes
Are BOTH “Ink Drainage” AND “Ink Refill”
executed TWO TIMES IN A ROW?
Yes
No
Refer to “4.14 Troubleshooting Procedure for the Circulation System”,
Trouble symptom [No collection], Probable cause [The collection pump
malfunctions].
Is the problem fixed?
No
No
Yes No
Refer to “4.14 Troubleshooting
Procedure for the Circulation System”, Trouble
symptom [Ink does not jet.] and [Makeup does not
circulate.], and “6.5.8 No ink ejection
from nozzle”.
Refer to “4.14 Troubleshooting Procedure for the
Circulation System”,
Trouble symptom [Ink does not jet.],
Probable cause [The supply pump malfunctions].
No
Restore
Restore
Solenoid valve verification
Recovery line verification
Supply/Cleaning line verification
Yes
Does makeup eject at “Ink stream
alignment”?
[NOTE]
When the makeup does not eject the 1st
time, please try the 2nd time.
Restore
Yes
(*) BOTH “Ink Drainage” AND “Ink Refill” are executed
TWO TIMES IN A ROW.
“Restart Operation After Long-Term Shutdown” is completed.
“Restart Operation After Long-Term Shutdown”
Refer to “4.14 Troubleshooting Procedure for the
Circulation System”,
Trouble symptom [No collection] and
“6.5.18 No ink suction from gutter”.
Restore
Execute <Process after long-term shutdown>.
(*)
Refer to “4.14 Troubleshooting Procedure for the Circulation
System, Trouble symptom [Charging or drainage is impossible.]
and [When the message “Failure was detected in level sensor,
pump, or solenoid valve” is displayed on the screen.].
Does “Ink Beam Bent” occur?
Restore
Refer to “6.5.6 Ink
leakage/blowout“.
Does Ink pressure change by arbitrarily rotating
the handle of Pressure reducing valve?
Yes
No
Restore
Refer to “4.14 Troubleshooting Procedure for the Circulation
System”, Trouble symptom [The ink pressure does not
increase.] and “4.3 Pressure reducing valve replacement”.
Does an alarm like “Ink pressure low” or “No ink
drop charge” occur?
No
Refer to “4.14 Troubleshooting Procedure for the
Circulation System”, Trouble symptom [The ink pressure
does not increase], and
“4.12 Troubleshooting when Fault Occurs in Viscometer”.
Restore
Yes
Is the problem fixed?
Occur
Not occur
Occur
Not occur