Hitachi UX Twin Nozzle Service Manual page 319

6.4.16a (N1) Makeup Eject Pressure Low
(N1) Makeup eject Pressure Low
Replace makeup filter1.
Is the problem fixed?
Does MV8 operate?
Replace the makeup pump.
6.4.16b (N2) Makeup Eject Pressure Low
(N2) Makeup eject Pressure Low
Replace makeup filter2.
Is the problem fixed?
Does MV28 operate?
Replace the makeup pump.
Yes
No
No
Yes
No
Is the problem fixed?
Yes
No
No
Yes
Replace MV28.
No
Is the problem fixed?
6-77
Replace MV8.
Yes
Resume the operation
Yes
Resume the operation