Hitachi UX Twin Nozzle Service Manual page 204

The exhaust
route clogs.
The
circulating
pump
malfunctions
The solenoid
valve
malfunctions.
Viscometer
malfunctions.
The
circulation
route cloggs
The
viscometer
malfunctions.
During Ink
Refill, the
message
It takes too
"Failure was
long to supply
detected in
ink or
level sensor,
makeup to
pump, or
the main ink
solenoid
tank.
valve" is
displayed on
the screen.
Disconnect the Drain
Tube Joint of the
main ink tank to open
the main ink tank to
the atmosphere.
(Refer to "4.2.2 Main
Ink Tank
Replacement
The exhaust
Procedure".) Hold the
tube of the
Drain Tube Joint at a
main ink tank
high position so that
is clogged with
the ink does not
dried ink.
come out from the
drain tube. Then eject
the ink from the
nozzle and check
whether the ink
recovery from the
gutter is improved or
not.
Follow the same descriptions as those of "The supply pump
malfunctions ".
When "Open" is
executed on
"Solenoid
* MV4
malfunctions. Valve/Pump Test"
screen, no operation
sound is produced.
Back wash can be
Clogging in the
performed and MV4
pipe or joint
operates properly.
Other than above
When "Operated" of
pump and then
"Open" of MV1 and
Ink supply
pump is MV6 are executed on
"Solenoid valve /
clogged.
pump test" screen,
the ink does not flow.
When "Open" is
executed on
"Solenoid
* MV2
malfunctions. Valve/Pump Test"
screen, no operation
sound is produced.
When "Open" is
executed on
"Solenoid
* MV7
malfunctions. Valve/Pump Test"
screen, no operation
sound is produced.
Refer to "6.2.8
The initial level
Makeup
can not be
Replenishment
detected.
Timeout".
Full of air in the Check the circulation
tubes. line M with eyes.
4-70
Remove the exhaust
tube connected to the
Tube Lock (1) of the
main ink tank. (Refer
to "4.2.2 Main Ink
Tank Replacement
Procedure"). Inject
makeup into the
exhaust tube and
wash inside.
When the fault is not
recovered, replace
the exhaust tube.
- Exhaust tube
specifications
Part name:
PTFE tube 2-3
Part No.: 451064
Cut length: 1000mm
Replace or repair the
solenoid valve (MV4).
Refer to "4.15
Repairing method
when the circulation
route is dry or sticks".
Refer to "4.15
Repairing method
when the circulation
route is dry or sticks".
Replace or repair the
Viscometer.
Refer to "4.15
Repairing method
when the circulation
route is dry or sticks".
Replace or repair the
solenoid valve (MV2).
Refer to "4.15
Repairing method
when the circulation
route is dry or sticks".
Replace or repair the
solenoid valve (MV7).
Refer to "4.15
Repairing method
when the circulation
route is dry or sticks".
-
Execute the Ink refill
again.