Hitachi IJ PH Service Manual page 35

Open : The solenoid valve is opened.
Close : The solenoid valve is closed.
Operated : The pump is operated.
Stop : The pump is stopped.
2 When pressing Back, the screen returns to the maintenance menu
screen.
*Caution:
The pumps and solenoid valve can be operated simultaneously
however, operate them with care when the solenoid valves are
turned on while pump is activated because it is not a steady
operation.
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