Hitachi IJ UX Service Manual page 222

6.2.2 Main Ink Tank Too Full
Main Ink Tank Too Full
Open the maintenance cover.
Is the ink main tank full
of ink?
No
Turn OFF the power and then
pull out the sensor .
Is there a creepage leak
between the ground
electrode and the over fill
electrode of liquid level
detection of the main tank?
(Check it by mounting and
removing the harness.)
No
Replace the EZJ126 board.
Is the initial-level sensor
ON?
Yes Has the Main Ink
Tank Too Fill fault
frequently occurred?
Replace the MV7 (makeup
valve) unit.
Yes
Remove the ink
adhering onto the
creepage surface
between the two
electrodes. Or replace
the sensor part of the
main ink tank.
No
Is the fault cleared
by power-on reset?
6-4
No
Yes
Check the initial-
level sensor
No
connection again and
correct it if necessary.
Yes
Drain the ink from the
ink main tank, and clear
the fault by pressing
the Clear key.
Execute "Ink Drainage"
and "ink refill"
procedure, and confirm
that ink is refilled to
initial level of ink main
tank.
Yes
END