Hitachi PB - Page 84

4-22
symptom Probable cause
Check method
Repairing method
The pressure
resistance of
MV7 is
faulty.
The makeup ink in
the pipe N is
sucked even
during operation
(except at supply).
(Make a check
after removing the
tube connection
block of the
makeup ink tank.)
Replace the solenoid
valve (MV7).
The pressure
resistance of
MV8 is
faulty.
The makeup ink
jets and cannot be
stopped “at non-
cleaning stop”.
Replace the solenoid
valve (MV8).
Ink Level
Over often
occurs.
The solenoid
valve
malfunctions.
The pressure
resistance of
MV2 is
faulty.
The ink in the pipe
M is sucked even
during operation
(except at supply).
(Make a check
after removing the
tube connection
block of the ink
tank.)
Replace the solenoid
valve (MV2).
The collection
pump
malfunctions.
The same as “Ink does not jet".
The solenoid
valve
malfunctions.
※MV3
malfunctio
ns.
When “Release” is
executed on the
Solenoid
Valve/Pump Test
screen, no
operation sound is
produced.
Replace or repair the
solenoid valve (MV3).
Refer to “4.12
Repairing method
when the circulation
route dry or sticks”.
Clogging in
the collection
filter
A lot of foreign
materials stick on
the collection
filter.
Replace the collection
filter.
No
collection
The collection
route clogs.
Clogging in
the pipe or
joint
Suck is performed
when the tube
connected to the
collection filter is
removed.
Force the intensifier in
by applying pressure
with a hand pump
from the end of the
collection filter
connecting tube.
･Hand pump
specifications
Part name:
Nozzle cleaning
assembly
Part No.: 45100