Hitachi UX Twin Nozzle Service Manual page 345

6.5.20 Startup process after long-term shutdown and How to restore
the operation
"Restart Operation After Long-Term Shutdown"
Solenoid valve verification
Are the valve(MV1 to 9, 11, 12,
23, 25, 28, 29) making
operation sound?
Yes
Viscometer verification
When the viscometer is working,
is Red indicator turned OFF?
Yes
Recovery line verification
Is the ink flow at tube B confirmed at
はい
"Recovery line operation check"? *1)
Yes
Supply/Cleaning line verification
Does makeup eject at "Ink stream
alignment"?
はい
[NOTE]
When the makeup does not eject the 1st
time, please try the 2nd time.
Yes
Does "Ink Beam Bent" occur?
Not occur
Execute <Process after long-term shutdown>. (*)
Yes
Are BOTH "Ink Drainage" AND "Ink Refill"
executed TWO TIMES IN A ROW?
Yes
Circulation line verification
Does an alarm like "Ink pressure low" or "No ink
drop charge" occur?
Not occur
Does Ink pressure change by arbitrarily rotating
the handle of Pressure reducing valve?
Yes
"Restart Operation After Long-Term Shutdown" is completed.
No
Refer to "4.5 solenoid valve replacement" and/or "5.5 Shutoff valve
(MV9, MV29) replacement" or "4.15.1 How to restore operation when
solenoid valve seizure occurs".
Restore
No
Refer to "4.12 Troubleshooting when Fault Occurs in Viscometer"
Restore
Refer to "4.14 Troubleshooting Procedure for the Circulation System",
No
Trouble symptom [No collection], Probable cause [The collection pump
malfunctions].
Yes
Is the problem fixed?
Restore
No
Yes
Is the problem fixed?
Restore
Occur
Restore
No
(*) BOTH "Ink Drainage" AND "Ink Refill" are executed
TWO TIMES IN A ROW.
No
Restore
Occur
Restore
No
Restore
6-103
No
Refer to "4.14 Troubleshooting Procedure for the
Circulation System",
Trouble symptom [No collection] and
"6.5.18 No ink suction from gutter".
Refer to "4.14 Troubleshooting Procedure for the
Circulation System",
Trouble symptom [Ink does not jet.],
Probable cause [The supply pump malfunctions].
Refer to "4.14 Troubleshooting
No
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 "6.5.6 Ink
leakage/blowout".
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.].
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".
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".
*1) Recovery route operation check:
This operation is the work for checking of the ink
clogging in recovery route.
[Operation procedures]
(1) On "Solenoid v/p test" screen, press Pump1
"Operated" first, and then press "MV3" on
<Nozzle1>.
Secondly press Pump2 "Operated", and then press
"MV23" on <Nozzle2>.
(2) Sprinkle makeup on the gutters, and check if the
makeup is suctioned.