Hitachi IJ PH Service Manual page 116

Symptom Probable cause
The
collection
pump
malfunctions.
The solenoid
valve
malfunctions.
No
collection
The
collection
route clogs.
The
circulation
pump
malfunctions.
The solenoid
valve
A
malfunctions
viscometer
error
occurs.
The
circulation
route clogs.
Viscometer
failure
The
circulating
pump
malfunctions.
Backwash
is
impossible.
The solenoid
valve
malfunctions.
The
pressure
The solenoid
drops
valve
during
malfunctions.
normal
operation.
Check method
The same as "The supply pump malfunctions ".
When "Open" is
executed on the
* MV3
Solenoid
Valve/Pump Test
malfunctions.
screen, no operation
sound is produced.
Clogging in A lot of foreign
the collection materials stick on
filter the collection filter.
Suck is performed
Clogging in when the tube
the pipe or connected to the
joint collection filter is
removed.
The same as "The supply pump malfunctions ".
When "Open" is
executed on the
* MV4 Solenoid
malfunctions. Valve/Pump Test
screen, no operation
sound is produced.
The nozzle can be
Clogging in
flushed reversely
the pipe or
and MV4 can be
joint
operated normally.
Except the above
The same as "The supply pump malfunctions ".
When "Open" is
executed on the
* MV5
Solenoid
Valve/Pump Test
malfunctions.
screen, no operation
sound is produced.
When "Open" is
executed on the
* MV2
Solenoid
Valve/Pump Test
malfunctions.
screen, no operation
sound is produced.
4-27
Repairing method
Replace or repair the
solenoid valve (MV3).
Refer to "4.12
Repairing method
when the circulation
route dry or sticks".
Replace the collection
filter.
Force the intensifier in
by applying pressure
with a hand pump
from the end of the
collection filter
connecting tube.
- Hand pump
specifications
Part name:
Nozzle cleaning
assembly
Part No.: 45100
Replace or repair the
solenoid valve (MV3).
Refer to "4.12
Repairing method
when the circulation
route dry or sticks".
Refer to "4.12
Repairing method
when the circulation
route dry or sticks".
Refer to "4.9
Viscometer
Replacement
Procedure".
Replace or repair the
solenoid valve (MV5).
Refer to "4.12
Repairing method
when the circulation
route dry or sticks".
Replace or repair the
solenoid valve (MV2).
Refer to "4.12
Repairing method
when the circulation
route dry or sticks".