Hitachi UX Twin Nozzle - Page 316

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6.4.13a (N1) Ink Pressure Low
(*1): When you replace pressure reducing valve, refer to “4.3
Pressure Reducing Valve Replacement Procedure”.
(*2): When you replace pressure sensor1, refer to “4.6.1
Pressure Sensor (Nozzle 1) Replacement Procedure”.
Replace ink filter.
No
Yes
No
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 sensor1.*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 Nozzle1.
Replace or repair the troubled
solenoid.
Replace or repair the
supply pump.
No
Yes
Yes
No
(N1) Ink Pressure Low
Confirm the indicated value and standard value of ink
pressure in Nozzle1 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 Nozzle1 exceeds the lower limit?
(Standard value x 0.90 >Indicated value)
No
Yes
Yes
Yes
No
No
Does MV9 operate?
Does ink flow into main ink tank
when pumps MV1 & MV6 are
operated?