Hitachi PB - Solenoid Valves Replacement Procedure

4-10
4.6 Solenoid Valves Replacement Procedure
Caution : The MV8(cleaning valve) is not compatibility with other than solenoid
valve. It recognizes as shown below.
１ Perform the following pre-replacement operation for each solenoid valve
that you are to replace.
Solenoid
valve No.
When the solenoid valve is
operated
When the solenoid valve is not
operated
ＭＶ１
Execute “Ink drainage”. Drain the ink in the main ink
tank from the drain tube.
ＭＶ２
(1) Remove the tube connection
block of the ink tank.
(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.
(Take care about an ink drip.)
ＭＶ３
Execute “Cleaning the Gutter”. No operation is required.
(Take care about an ink drip.)
ＭＶ４
Execute “Ink drainage”. No operation is required.
(Take care about an ink drip.)
ＭＶ５
Execute “Nozzle backwash”. No operation is required.
(Take care about an ink drip.)
ＭＶ６
Execute “Ink drainage”. No operation is required.
(Take care about an ink drip.)
ＭＶ７
Execute “Ink drainage”. Drain the ink in the main ink
tank from the drain tube.
ＭＶ８
Execute “Pressure relief”. No operation is required.
(Take care about an makeup
ink drip.)
２ Turn off the power supply.
３ Perform “4.1.3 Approach to the parts on the rear side of the equipment”.
４ Remove the connector of the solenoid valve to be replaced.
Solenoid valve No.. Wire color Solenoid valve No. Wire color
MV1 Brown MV5 Green
MV2 Red MV6 Blue
MV3 Orange MV7 Purple
MV4 Yellow MV8 Gray
MV8 (Cleaning valve）
Other than solenoid valve
Orange TYPE-FORM
(serial No.)
White TYPE-FORM
(serial No.)