Annual Schedule; 3-Year And 4-Year Schedule - Hitachi NEXT Series Instruction Manual

9. MAINTENANCE [Standard Maintenance Schedule]

Annual Schedule

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

3-year and 4-year Schedule

Part or Item
Control line filter element
Oil filter (secondary)
Consumable parts - Suction throttle valve
Seal washer - Suction throttle valve
Seal gasket - Suction throttle Valve
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
Relay (Drain solenoid valve)
PC Board - Inverter, Module, FFC (Flat cable) Check/Clean/
※ When the power-saving operation is used, the parts need to be replaced every 2 years.
5 6-year (Overhaul)
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
78
(for 4,000 hours /year or less operation)
Action Category
Replace ○
Tighten/Check △
Replace ○
Replace ○
Clean ▲
▲
Check
Check for crack/Clean ▲
Check/Clean ▲
▲
Check/Clean ▲
Check/Clean ▲
Check/Clean ▲
▲
Check
Check ▲
Check/Clean ▲
Check ▲
Check/Clean ▲
(for 4,000 hours /year or less operation)
Category
Action
3-year 4-year Fixed/V
○
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 ▲
Replace ●
Type
Fixed/V A/W
Fixed/V A/W Replace every 8,000h operating hour or 2 year, whichever comes earlier)
Fixed/V A/W
Fixed/V A/W
Fixed/V A/W
Fixed/V A/W
Fixed/V A/W Change any operating parts in need of replacement.
Fixed/V
Fixed/V A/W Clean as required.
Fixed/V A/W Clean as required.
Fixed/V A/W Clean as required.
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.
Type
A/W
Fixed A/W
Fixed/V A/W
Fixed A/W ※
Fixed 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
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