Hitachi UX Twin Nozzle Service Manual page 313

6.4.11a (N1) Ink Pressure High
(N1)Ink Pressure High
Check the indicated value and
standard value of the ink
pressure of nozzle1 on "Operation
management" screen.
The indicated value of ink pressure in
Nozzle1 exceeds the upper limit?
(Standard value x 1.10 >Indicated value)
No
Is the difference of ±0.01MPa
or more in indicated value of
ink pressure between Nozzle1
and Nozzle2?
Replace MGV filter for Nozzle
of lower ink pressure.
Is the difference of ±0.01MPa
or more in indicated value of
ink pressure between Nozzle1
and Nozzle2?
Replace the pressure sensor1.
Is the warning released?
Resume the
(*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
No
Yes
No
Adjust the pressure to
Yes pressure reducing valve
No
Yes
operation.
Can the pressure be
adjusted by the pressure
reducing valve?
Replace the pressure reducing
valve.
Can the pressure be
adjusted by the pressure
reducing valve?
Yes
standard value by the
Replace the pressure sensor1 and 2. *1 *2
6-71
No
No