Hitachi UX Twin Nozzle - Page 198

4-64
Trouble
symptom
Probable cause
Check method
Repairing method
Ink in
Nozzle 2 is
not ejected.
The supply
pump
malfunctions.
Follow the same descriptions as those of “Ink in Nozzle 1 is not
ejected”.
The solenoid
valve
malfunctions.
* MV1
malfunctions.
When “Open” is
executed on “Solenoid
Valve/Pump Test”
screen, no operation
sound is produced.
Replace or repair the
solenoid valve (MV1).
Refer to “4.15 Repairing
method when the
circulation route is dry or
sticks”.
* MV29
malfunctions.
When “Open” is
executed on “Solenoid
Valve/Pump Test”
screen, no operation
sound is produced.
Replace the solenoid
valve (MV29).
The supply
route clogs.
Clogging in the
pipe or joint.
The operation sound of
MV1 and MV29 is
produced, but ink does
not flow.
Refer to “4.15 Repairing
method when the
circulation route is dry or
sticks”.
Clogging in the
orifice plate.
When backwash
conducted, makeup
does not flow to the
tube of circulation
route.
Clean the orifice plate
with ultrasonic cleaning.
Charging or
drainage is
impossible.
The supply
pump
malfunctions.
Follow the same descriptions as those of “Ink in Nozzle 1 is not
ejected”.
The solenoid
valve
malfunctions.
* 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”.
The solenoid
valve
malfunctions.
* MV6
malfunctions.
When “Open” is
executed on “Solenoid
Valve/Pump Test”
screen, no operation
sound is produced.
Replace or repair the
solenoid valve (MV6).
Refer to “4.15 Repairing
method when the
circulation route is dry or
sticks”.