Hitachi UX Twin Nozzle, Service Manual

Page: 314 / 355

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6.4.11b (N2) Ink Pressure High
(*1): When you replace Pressure sensor1, refer to “4.6.1 Pressure Sensor (Nozzle 1) Replacement Procedure”.
(*2): When you replace Pressure sensor2, refer to “4.6.2 Pressure Sensor (Nozzle 2) Replacement Procedure
Yes
Yes
Yes
No
No
Yes
No
Yes
No
No
(N2)Ink Pressure High
Resume the
operation.
Adjust the pressure to
standard value by the
pressure reducing valve
Check the indicated value and
standard value of the ink
pressure of nozzle2 on “Operation
management” screen.
Can the pressure be
adjusted by the pressure
reducing valve?
Replace the pressure reducing
valve.
Replace the pressure sensor1 and 2. *1*2
Is the warning released?
Can the pressure be
adjusted by the pressure
reducing valve?
Replace MGV filter for Nozzle
of lower ink pressure.
Replace the pressure sensor2.
Is the difference of
±
0.01MPa
or more in indicated value of
ink pressure between Nozzle1
and Nozzle2?
Is the difference of
±
0.01MPa
or more in indicated value of
ink pressure between Nozzle1
and Nozzle2?
The indicated value of ink pressure in
Nozzle2 exceeds the upper limit?
(Standard value
x 1.10 >
Indicated value
)