Hitachi UX Twin Nozzle Service Manual page 201

The
pressure
The solenoid
drops
valve
during
malfunctions.
normal
operation.
The recovery
pump
malfunctions.
The solenoid
valve
malfunctions.
No recovery
(Nozzle 1)
The recovery
route clogs.
The ink in the pipe M is
sucked even during
The pressure operation (except at
resistance of MV2 supply). (Remove the
is faulty. tube connection block of
the ink reservoir and
check.)
When "Open" is
executed on "Solenoid
* MV2
Valve/Pump Test"
malfunctions.
screen, no operation
sound is produced.
Follow the same descriptions as those of "The supply pump
malfunctions ".
When "Open" is
executed on "Solenoid
* MV3
Valve/Pump Test"
malfunctions.
screen, no operation
sound is produced.
A lot of foreign materials
Clogging in the
stick on the recovery
recovery filter
filter.
Suck is performed when
Clogging in the the tube connected to
pipe or joint the recovery filter is
removed.
4-67
Replace the solenoid
valve (MV2).
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 (MV3).
Refer to "4.15 Repairing
method when the
circulation route is dry or
sticks".
Replace the recovery
filter.
Press makeup into the
end of the recovery filter
connecting tube by
applying pressure with a
hand pump.
- Hand pump
specifications
Part name:
Nozzle cleaning
assembly
Part No.: 451000