Hitachi IJ UX, Руководство по обслуживанию

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4-12
4.5 Solenoid Valve Replacement Procedure
[Caution]
・
Work contents differ according to the solenoid valve No. to be replaced.
・
If the solenoid valve does not operate, conduct the replacement work with particular attention to
dripping.
1 Perform the following preparation for each solenoid valve that you are to replace.
Solenoid
valve No.
When the solenoid valve is working When the solenoid valve is not working
MV1 Execute “Ink drainage”. Drain the ink of the main ink tank from
the drain tube.
MV2 (1) Remove the tube connection
block of the ink reservoir.
(2)Turn on the pump, MV2, and
MV6 in this order for about one
minute, and then turn them off.
(Solenoid/Pump Test screen)
No operation is required.
(Pay attention to ink dripping.)
MV3 Execute “Gutter Cleaning”. No operation is required.
(Pay attention to ink dripping.)
MV4 Execute “Ink drainage”. No operation is required.
(Pay attention to ink dripping.)
MV5 Execute “Nozzle backwash”. No operation is required.
(Pay attention to ink dripping.)
MV6 Execute “Ink drainage”. No operation is required.
(Pay attention to ink dripping.)
MV7 Execute “Ink drainage”. Drain the ink of the main ink tank from
the drain tube.
MV8 Execute “Pressure relief”. No operation is required.
(Pay attention to makeup dripping.)
MV11(*1)
No operation is required.
(Pay attention to makeup dripping.)
No operation is required.
(Pay attention to ink dripping.)
MV12(*1) Execute “Pressure relief”.
No operation is required.
(Pay attention to ink dripping.)
2 Turn off the power supply.
【
Work from the front
】
3 Perform “4.1.2 Access to the parts on the front side of the equipment”.
【
Work from the rear
】
3 Perform “4.1.3 Access to the parts on the rear side of the equipment”.
4 Remove the connector of the solenoid valve to be replaced.
*1 MV11 and MV12 are mounted on UX-E only.
Solenoid valve No.
Wire color
Solenoid valve No.
Wire color
Solenoid valve No.
Wire color
MV1 Brown MV5 Green MV11(*1) Brown
MV2 Red MV6 Blue MV12(*1) Red
MV3
Orange
MV7
Purple
－ －
MV4
Yellow
MV8
Gray
－ －
・
Parts inside the solenoid valve (diaphragm, etc.) cannot be replaced separately. In the case of
part failure, replace the entire solenoid valve.
・
The coil mold of the solenoid valve (black resin portion) is not resistant to solvents. Do not
immerse the coil mold in solvent. The coil mold however can be wiped gently with solvent.