Annual And 3-Year Schedule; 2-Year And 4-Year Schedule; 6-Year (Overhaul) - Hitachi NEXT Series Instruction Manual

9. MAINTENANCE [Standard Maintenance Schedule]

Annual and 3-year Schedule

3
Part or Item
Lubricating oil
Joints, Bolts, Nuts
Gasket - Inter/Aftercooler condensate strainer
O-ring - Inter/Aftercooler condensate strainer
Oil filter (secondary)
Consumable parts - Suction throttle valve
Seal washer - Suction throttle valve
Seal gasket - Suction throttle valve
Thermistor, Pressure sensor, PCB other Electric parts
Cooling fan
Orifice - Aftercooler condensate
Orifice and Check valve - Intercooler condensate Check/Clean
Aftercooler/Intercooler/Oil cooler
Hi-Precooler
Demister - Drain separator
3-Way solenoid valve & Capacity control system
Blowoff solenoid valve
Air relief valve
Protection, Safety device
Motors
Relay (Drain solenoid valve)
4

2-year and 4-year Schedule

Part or Item
Control line filter element
Blowoff solenoid valve (1) (2)
Consumable parts - Oil pump
Check valve
Solenoid valve - Intercooler/Aftercooler condensate
Check valve and Strainer - Intercooler condensate
Check valve - Control line
VFD (Variable Frequency Drive)
Cooling capacity for VFD
Cooling fan for control panel
PC Board - Inverter, Module, FFC (Flat cable)

6-year (Overhaul)

5
Part or Item
Airend (1st-stage, 2nd-stage)
Main motor bearing
Fan motor bearing
Demister - Drain separator
3-Way solenoid valve
Oil strainer (primary)
Control line filter - Condensate
Oil level gauge
Shaft seal - Main motor
Temperature control valve
Smoothing condenser - Controller
PC board assembly
PC board - Inverter
Electromagnetic contactor
Lithium battery
※ For the 3rd overhaul, the air ends shall be replaced with new ones.
76
(for 8,000 hours/year or less operation)
Category
Action
Every year Every 3-year Fixed/V
Replace ○
Tighten/Check △
○
Replace
○
Replace
Replace ●
Replace ●
Replace ●
Replace ●
Check ▲
▲
Check for crack/Clean
Check/Clean ▲
▲
Check/Clean ▲
Check/Clean ▲
Check/Clean ▲
Check ▲
▲
Check
Check/Clean ▲
Check ▲
Check/Clean ▲
Replace ●
(for 8,000 hours/year or less operation)
Category
Action
2-year 4-year Fixed/V
Replace ○
Replace ●
Replace ●
Replace ●
●
Replace
●
Replace
Replace ●
Check ▲
Replace ●
Replace ●
Check/Clean/
●
Replace
(for 8,000 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 ▲
Replace ●
Type
A/W
Fixed/V A/W
Fixed/V A/W
Fixed/V A/W
Fixed/V A/W
Fixed/V A/W
Fixed A/W
Fixed A/W
Fixed A/W
Fixed/V A/W Change any operating parts in need of replacement.
Fixed/V A/W
Fixed/V A/W Clean as required.
Fixed/V A/W Clean as required.
Fixed/V A/W
Fixed/V A only
Fixed/V A/W
Fixed A/W Replace as required.
V A/W
Fixed/V A/W
Fixed/V A/W Change any operating parts in need of replacement.
Fixed/V A/W Measure insulation resistance and clean.
Fixed/V A/W
Type
A/W
Fixed A/W
V A/W
Fixed/V A/W
Fixed/V A/W
Fixed/V A/W Replace the strainer together.
Fixed/V A/W
Fixed A/W
V A/W Clean the heat sink fin
V A/W
Fixed/V A/W
Check for contamination and discoloration. Replace if
V A/W
faulty. May be used further if appropriate. (Except FFC)
Type
Fixed/V A/W
Fixed/V A/W A whole airend is replaced with a new
Fixed/V A/W
Fixed/V A/W
Fixed/V A/W
Fixed A/W
Fixed/V A/W
Fixed A/W
Fixed/V A/W
Fixed/V A/W
Fixed/V A/W
V A/W
Check for contamination and discoloration.
Fixed/V A/W
Replace if faulty. May be used further if appropriate.
Check for contamination and discoloration.
V A/W
Replace if faulty. May be used further if appropriate.
Fixed/V A/W Replace as required.
Fixed/V A/W
Remarks
Remarks
Remarks