Hitachi IJ UX Service Manual page 267

6.4.11 Ink Pressure High
Ink Pressure High
Check the indicated value and
standard value of the ink
pressure on the Operation
management screen.
Is it above the upper limit?
(Indicated value >
standard value x 1.10)
No
Is the warning released?
Yes
Resume the
operation.
Yes
Yes
Adjust the pressure to
standard value by the
pressure reducing valve
No
6-49
Can the pressure be
Yes
adjusted by the pressure
reducing valve?
No
Replace the pressure reducing
valve.
Can the pressure be
adjusted by the pressure
reducing valve?
No
Replace the pressure sensor.