Hitachi UX Twin Nozzle - Page 317

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6.4.13b (N2) Ink Pressure Low
(*1): When you replace pressure reducing valve,
refer to “4.3 Pressure Reducing Valve
Replacement Procedure”.
(*2): When you replace pressure sensor2, refer to
“4.6.2 Pressure Sensor (Nozzle 2) Replacement
Procedure”.
Replace ink filter.
No
No
Yes
Can the pressure be adjusted by
the pressure reducing valve?
Yes
Resume the operation.
Adjust the pressure to
standard value
by the pressure reducing
valve.
Replace the pressure reducing valve.*1
Replace the pressure sensor2.*2
Is the warning released?
Can the pressure be adjusted by
the pressure reducing valve?
Can the pressure be adjusted by
the pressure reducing valve?
No
No
Yes
Yes
Replace or repair the troubled
solenoid.
Replace MGV filter in Nozzle2.
Replace or repair the troubled
solenoid.
Replace or repair the
supply pump.
No
Yes
Yes
No
(N2) Ink Pressure Low
Confirm the indicated value and standard value of ink
pressure in Nozzle2 on “Operation management” screen.
Is the difference of ±0.01MPa
or more in indicated value of
ink pressure between Nozzle1
and Nozzle2?
Do MV1 and 2 operate?
The indicated value of ink pressure
in Nozzle2 exceeds the lower limit?
(Standard value x 0.90 >Indicated value)
No
Yes
Yes
Yes
No
No
Does MV29 operate?
Does ink flow into main ink tank
when pumps MV1 & MV6 are
operated?