Hitachi PH Instruction Manual page 269

12. Maintenance
12-1 ● Maintenance
● To maintain the IJ printer in an optimum operating condition, it is necessary to perform
the following maintenance programs.
(1)Consumables replacement
Periodically replace the following filters.
No. Consumable
1 Ink filter
2 Circulation filter
3 Recovery filter
4 Air filter
● Operating time of 2400 hours is equivalent to a 1-year operation that is performed
8 hours a day, 25 days a month.
● The minimum retention periods of replacement parts (including consumable
parts) are 7 years after closing manufacturing.
● When you order consumable parts,inform the parts name and the parts code.
No. Consumable
1 Ink filter
2 Circulation filter
3 Recovery filter
4 Air filter
(2) Other maintenance programs
a. Check for abnormal sound generation from the pump at about 1-week intervals.
b. Before verifying the print results at the beginning of each day's operations, check that
the pressure value is optimal. (For the verification procedure, see Section 7.12,
Pressure Adjustment.)
c. For ink drop and excitation voltage checkout, see Section 7.13, Excitation Setting
Adjustment , and Section 7.14, Ink Drop Generation Status Checkout Procedure.
(3) Parts to be replaced periodically
The clock battery, circulation system parts (pump, solenoid valve, etc.), and heating
unit need periodic replacement. Consult your Hitachi distributor.
Approximate
replacement intervals
2,400 hr "7.9 Ink Filter Replacement"
2,400 hr "7.11 Circulation Filter Replacement"
1,200 hr "7.10 Recovery Filter Replacement"
2,400hr See the next page.
Parts name
Ink filter parts
PTFE filter 20 pack 2
Nozzle flat filter 75
Air filter parts
Replacement procedure
reference section
Part code Note
451590 Nominally 10 μm
451487 2 pieces/1 pack
451037
451594 3 pieces/1 pack