Testing Operation Of Solenoid Valve And Pump - Hitachi UX Twin-Nozzle Technical Manual

6.13 Testing operation of solenoid valve and pump

● The operation confirmation of solenoid valve and pump is performed.
①
Supply valve
④
Agitation valve
⑦ Makeup valve
⑩
Pump
⑬
Circulation valve 2 (MV25)
●If circulating system can not be operated due to no ink ejection, ink overflow from the gutter and such,
there are possibilities of solenoid valve or pump failure. Please perform operation test under service
personnel's guidance.
●In an operation state, only an operating state is displayed.
The operation confirmation of solenoid
valve and pump is performed (Operates
each valves individually).
At the maintenance menu, press Solenoid valve / pump test .
1
The solenoid valve / pump test screen is displayed.
Solenoid v/p test
MV1 Open Close
MV2 Open Close
MV4 Open Close
MV6
Open Close
MV7
Open Close
Oper-
Visco-
Stop
ated
meter
Ink pressure 1
Ink pressure 2
2
Press operation button.
The operating state of the solenoid valve and the pump is displayed.
(Confirm the operation by an operating sound.)
Open
Close
Operated : The pump is operated.
Stop
②
(MV1) Replenishment valve (MV2)
⑤
(MV4) Circulation valve
⑧ Cleaning valve
(MV7)
⑪
Viscosity meter
⑭
Cleaning valve 2
Different operations by state
Ink stop state
[Stop ]
<Nozzle 1>
MV3 Open Close MV23
MV5 Open Close MV25
MV8 Open Close MV28
MV9 MV29
Open Close
Oper-
Pump1 Pump2
Stop
ated
０．０２０
０．０２０ (MPa; standard value : ０．２５５)
: The solenoid valve is opened.
: The solenoid valve is closed.
: The pump is stopped.
(MV5)
(MV8)
(MV10)
(MV28)
Except for Ink stop state
Displays operating state only.
Operating test such as open/close valve cannot
be performed.
2018.07.07 12:45
Com=1
<Nozzle 2>
Open Close
Open Close
Open Close
Open Close
Oper-
Stop
ated
Back
③
Recovery valve (MV3)
⑥
Pressure relief valve (MV6)
⑨
Shutoff valve (MV9)
⑫
Recovery valve 2 (MV23)
⑮
Shutoff valve 2 (MV29)
●Test of solenoid valve/pump 6-36