Hitachi NEXT Series Service Manual page 18

Oil-free screw compressor
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Part or Item
Hi-Precooler
Demister - Drain separator
3-Way solenoid valve & capacity control system
Blowoff solenoid Valve
Air relief valve
Protection, Safety device
Motors
3-Year Schedule
4
Part or Item
Control line fi lter element
Oil fi lter (secondary)
Consumable parts - Suction throttle valve
Seal washer - Suction thorottle valve
Seal gasket - Suction thorottle valve
Blowoff solenoid valve (1) (2)
Consumable parts - Oil Pump
Check valve
Solenoid valve - Intercooler/ Aftercooler condensate
Check valve & strainer- Intercooler condensate
Check valve - Control line
DCBL Controller
Controller fan (1), DCBL controller
Cooling fan for fan inverter
Cooling fan for control panel
Relay (Drain solenoid valve)
※When the power-saving operation is used, the parts need to be replaced every 2 years.
6-Year Schedule: Overhauling
5
Part or Item
Airend (1st-stage, 2nd-stage)
Main motor bearing
Fan motor bearing
Demister - Drain separator
3-Way solenoid valve & capacity control system
Oil strainer (primary)
Control line fi lter - Condensate
Oil level gauge
Shaft seal - Main motor
Temperature control valve
Smoothing condenser - Controller
PC board assembly (Including LCD)
Power PCB - Controller
Communication board
Electromagnetic contactor
Lithium battery
Fan inverter
Action
Category
Check / Clean
Check / Clean
Check
Check
Check / Clean
Check
Check / Clean
(for 4,000 hours/year or less operation)
Action
Category
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Check
Replace
Replace
Replace
Replace
(for 4,000 hours/year or less operation)
Action
Category
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Replace
Check / Clean
Replace
Replace
Check / Clean
/ Replace
Check / Clean
/ Replace
Check / Clean
/ Replace
Check
Replace
Replace
16
Type
Fixed / V Clean as required. (Air-cooled 125psi (0.86)MPa type)
Fixed / V
Fixed
Replace as required.
V
Fixed / V
Fixed / V Change any operating parts in need of replacement.
Fixed / V Clean and measure the insulation for any resistance.
Type
Fixed
Fixed / V
Fixed
Fixed
Fixed
V
Fixed / V
Fixed / V
Fixed / V
Fixed / V
Fixed
V
Clean the fi n and duct.
V
Fixed
Clean the fi n (Air-cooled type)
Fixed / V Except 45/55kW fi xed speed type
Fixed / V
Type
Fixed / V A whole airend is replaced with a new
Fixed / V
Fixed / V Air-cooled type
Fixed / V
Fixed
Fixed / V
Fixed
Fixed / V
Fixed / V
Fixed / V
V
Fixed / V
Check for contamination and discoloration.
V
Replace as required.
Can be used further if appropriate.
Fixed / V
Fixed / V Replace as required.
Fixed / V
Fixed / V Air-cooled type
Remarks
Remarks
Remarks

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