Hitachi NEXT Series Service Manual page 17

Oil-free screw compressor
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Maintenance Schedule B (for 4,000 hours/year or less operation)
Follow this schedule (B) if the MAINT.SCHEDULE : B appears on the LCD monitor.
Daily Schedule
1
Part or Item
LCD indications
Oil level
Aftercooler/ Intercooler - Condensate
Control line fi lter - Condensate
Bi-Annual Schedule
2
Part or Item
Air intake fi tter
Main motor greasing
Oil fi lter (secondary) – Pressure
Control line fi lter – Condensate
Strainer – Aftercooler/ Intercooler condensate drain
Oil strainer (primary)
Aftercooler/ Intercooler/ Oil cooler (air side) Check / Clean
Hi-Precooler
Blowoff solenoid valve - Operation
Check valve - Air leak
Air relief valve - Operation
Annual Schedule
3
Part or Item
Lubrication oil
Joints, Bolts, Nuts
Air intake fi lter
Gasket - Inter/Aftercooler condensate strainer
O ring - Inter/Aftercooler condensate strainer
Oil strainer (primary)
Thermistor, Pressure sensor, PCB other Electric parts
Cooling fan
Contoller fan (1), DCBL controller
Cooling fan for fan inverter
Orifi ce- Aftercooler condensate
Orifi ce and check valve- Intercooler condensate Check / Clean
Aftercooler/ Intercooler/ Oil cooler (air side)
(for 4,000 hours/year or less operation)
Action
Category
Check
Check
Drain
Check
(for 4,000 hours/year or less operation)
Action
Category
Replace
Check
Clean
Clean
Check / Clean
Check / Clean
Check
Check
Check
(for 4,000 hours/year or less operation)
Action
Category
Replace
Tighten / Check
Replace
Replace
Replace
Clean
Check
Check for crack
/ Clean
Check for crack
/ Clean
Check for crack
/ Clean
Check / Clean
Check / Clean
○●... Replace
△○... Complete service in house
△▲... Clean or check
▲●... Ask your distributor to service
Type
Fixed / V
Record data in the OPERATION RECORD LOGBOOK.
Fixed / V
Add as required
Fixed / V
Fixed
Type
Fixed / V
Fixed / V
Fixed speed type: both DE / NDE side, Vtype: DE side
Fixed / V
Replace as required.
Fixed
Fixed / V
Fixed / V
Clean as required.
Fixed / V
Clean as required.
Fixed / V
Clean as required. (Air-cooled 125psi (0.86)MPa type)
Fixed / V
Fixed / V
Fixed / V
Type
Fixed / V Replace every 8,000h operating hour or 2 year, whichever comes earlier
Fixed / V
Fixed / V
Fixed / V
Fixed / V
Fixed / V
Fixed / V Change any operating parts in need replacement.
Fixed / V
V
Clean the fi n and duct
Fixed / V Clean the fi n (Air-cooled type)
Fixed / V Clean as required.
Fixed / V Clean as required.
Fixed / V
15
Remarks
Remarks
Remarks

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