Hitachi UX Twin Nozzle - Page 204

4-70
The exhaust
route clogs.
The exhaust
tube of the
main ink tank
is clogged with
dried ink.
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
Procedure”.) Hold the
Drain Tube Joint at a
high position so that
the ink does not
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.
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
Viscometer
malfunctions.
The
circulating
pump
malfunctions
Follow the same descriptions as those of “The supply pump
malfunctions ".
The solenoid
valve
malfunctions.
* MV4
malfunctions.
When “Open” is
executed on
“Solenoid
Valve/Pump Test”
screen, no operation
sound is produced.
Replace or repair the
solenoid valve (MV4).
Refer to “4.15
Repairing method
when the circulation
route is dry or sticks”.
The
circulation
route cloggs
Clogging in the
pipe or joint
Back wash can be
performed and MV4
operates properly.
Refer to “4.15
Repairing method
when the circulation
route is dry or sticks”.
The
viscometer
malfunctions.
Other than above
Replace or repair the
Viscometer.
During Ink
Refill, the
message
“Failure was
detected in
level sensor,
pump, or
solenoid
valve” is
displayed on
the screen.
It takes too
long to supply
ink or
makeup to
the main ink
tank.
Ink supply
pump is
clogged.
When “Operated” of
pump and then
“Open” of MV1 and
MV6 are executed on
“Solenoid valve /
pump test” screen,
the ink does not flow.
Refer to “4.15
Repairing method
when the circulation
route is dry or sticks”.
* MV2
malfunctions.
When “Open” is
executed on
“Solenoid
Valve/Pump Test”
screen, no operation
sound is produced.
Replace or repair the
solenoid valve (MV2).
Refer to “4.15
Repairing method
when the circulation
route is dry or sticks”.
* MV7
malfunctions.
When “Open” is
executed on
“Solenoid
Valve/Pump Test”
screen, no operation
sound is produced.
Replace or repair the
solenoid valve (MV7).
Refer to “4.15
Repairing method
when the circulation
route is dry or sticks”.
The initial level
can not be
detected.
Refer to “6.2.8
Makeup
Replenishment
Timeout”.
-
Full of air in the
tubes.
Check the circulation
line M with eyes.
Execute the Ink refill
again.