Hitachi IJ PH User Manual

4-25
4.11 Troubleshooting Procedure for the Circulation System
Perform “(1) Fault locating and repairing method” for each trouble symptom.
For the items marked * in “Probable Cause”, perform “(2) Locating method for the
control system/circulation system” to make sure that the control system is normal, and
then perform the repair work.
(1) Fault locating and repairing method
Trouble
symptom
Probable cause Status check Repairing method
* The motor
malfunctions.
The motor does not
rotate.
Replace the motor.
The drive cam
is damaged.
A crack or friction
powder is found on
the cam.
Replace the pump
unit.
The follow
operation of the
stroke is faulty.
The piston cannot
follow the cam
motion.
Replace the pump
unit.
Foreign
materials are
mixed in the
check valve.
The solenoid valve
is operated but
charging and
discard are not
completed within the
specified time.
If this trouble cannot
be repaired by
repeating the
operation and stop,
replace the pump
unit.
The supply
pump
malfunctions
.
The check
valve is dry or
sticks.
The solenoid valve
is operated but ink
does not flow.
Refer to “4.12
Repairing method
when the circulation
route dry or sticks”.
* MV1
malfunctions.
When “Open” is
executed on the
Solenoid
Valve/Pump Test
screen, no operation
sound is produced.
Replace or repair the
solenoid valve
(MV1). Refer to
“4.12 Repairing
method when the
circulation route dry
or sticks”.
The
solenoid
valve
malfunctions
.
* MV9
malfunctions.
When “Open” is
executed on the
Solenoid
Valve/Pump Test
screen, no operation
sound is produced.
Replace the solenoid
valve (MV9).
Clogging in the
pipe or joint.
The operation sound
of MV1 and MV9 is
produced, but ink
does not flow.
Refer to “4.12
Repairing method
when the circulation
route dry or sticks”.
Ink does
not jet.
The supply
route clogs.
Clogging in the
orifice plate.
When backwash
practice, makeup ink
does not flow to the
tube of circulation
route.
Clean the orifice
plate with ultrasonic
cleaning.
The makeup
ink pump
malfunctions
.
The same as “The supply pump malfunctions".
Makeup
ink does
not
circulate.
The
solenoid
valve
malfunctions
.
* MV8
malfunctions.
When “Open” is
executed on the
Solenoid
Valve/Pump Test
screen, no operation
sound is produced.
Replace the solenoid
valve (MV8).

Hitachi IJ PH Specifications

General

Brand	Hitachi
Model	IJ PH
Category	Printer
Language	English