Maintenance Standards (A) - Hitachi HISCREW 2000 Series Instruction Manual

8.2 Maintenance Standards (A) · · ·
The maintenance items marked with
The maintenance items marked with
Maintenance part and item
Oil level gauge
Discharge temp.
Refrigerant pressure
Relief valve
Dryer auto-drain trap
Lubricant (genuine synthetic oil)
Mechanical seal
Air intake filter element
Oil filter element
Belt, Pulley
Oil separator element
Solenoid valve
Cooling fan
Motor
Electric panel, instruments, sensors
Pipe joints
Oil cooler, Aftercooler
Dryer condenser
Dryer fan motor
Lubricant (genuine synthetic oil)
Oil level gauge
Suction throttle valve
Consumable
Parts
Modulator valve
Piston of minimum pressure valve and check valve
Oil temperature control valve
Oil replenish port O-ring
Belt, Pulley
Oil case
Belt
Mechanical seal
Check valve (1/4 inch)
Oil level gauge
Oil temperature control valve
Motor bearing
Thermistor
Dryer auto-drain trap
Compressor bearing
CPU printed curcuit board
* Replace these parts every 2 calendar years or when the A has loaded/unloaded total 1,000,000 times,
whichever comes earlier. For the total load/unload times, watch the digital monitor.
IMPORTANT
Relation between inspection time and run hours is based upon standards of 500h/month, 6,000h/year, 24,000h/4 years and 48,000h/8 years.
If run hour exceeds the standards, carry out inspection when it reaches to the standard index time, even before the inspection time.
8. PERIODIC MAINTENANCE [Maintenance Standards (A)]
must be carried out by users or, optionally, may be ordered to the dealer.
○
must be ordered to the dealer.
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Inspection time
Check
Daily 1 Month
Oil level check
○
Discharge temp. check
○
Pressure check ○
Performance check
○
Inspection/cleaning
○
Replenish/Analysis
（○）
Oil leak check
Replacement
Replacement
Inspection
Replacement
Performance check
Crack check/cleaning
Insulation check
Inspection/cleaning
Looseness check
Cleaning
Cleaning
Inspection
Replacement
Cleaning
*
Replacement
Replacement
*
Replacement
Inspection/cleaning
Replacement
Inspection
Inner inspection
Replacement
Replacement
Replacement
Replacement
Replacement
Replacement
Inspection
Replacement
Replacement
Check/Clean/Replace
In case of annual run hour less than 6,000 hours
1 Year 2 Years 4 Years 8 Years
Oil level must be within red lines during operation.
Must be between 65°C and 100°C.
Must be between 0.41 and 0.73 MPa.
Check by hand
Check condensate drainage, clean it if required.
Replenish every 1,500 to 2,000 hours
Sampling analysis every 3,000 hours
○
Clean if the error code of an element clogging appears
on the digital monitor. Replace whenever the number
○
of times of cleaning has reached 6 times even within
one year interval.
○
○ Visual check of wear, check abnormal noise.
Replace the housing and square ring as well.
●
●
●
● 1M ohm or more at DC500 V Mega
●
Terminal refastening, electric line cover check and cleaning
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●
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●
○
During cleaning, also replace a seal washer.
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Replace the cap seal, valve plate, and O-ring. Clean.
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Replace the diaphragm, and rubber sheet. Clean.
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Change O-ring.
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Tension check, wear check.
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Replace the pulley as required.
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Locate it on the oil-scavenging pipe from the shaft seal.
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Change may be postponed according to the state of the bearing.
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●
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If it is dirty or shows a change in color, replace it.
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If not so, clean it and continue to use it.
Reference
Note
page No.
18
8
16
48
47
18
50
49
55
53
48
19
52
55
45