16
Part Name
Regular Inspection
Preventive Maintenance*
Remarks
Part Name
Details of Inspection
Inspection Method
Criteria <Standard>
Details of Maintenance
Inspection
Interval
Maintenance Interval
(Used Hours/Duration)
Elapsed Years
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15
Electric and
electronic
parts
Crankcase heater
- Conductivity check
- Insulation resistance measurement
- Appearance check
Tester
500 V mega
Visual inspection
- It should be in a conducting state
- The resistance value should be 1 M
Ω
or more
- There should be no abnormality
- Replace it if it is not in a conducting state
- Replace it if the resistance value is 1 M
Ω
or less
Every year
Before
the air-
conditioning
season
8 years
Consumable
components
Anti-freezing heater
- Conductivity check
- Insulation resistance, appearance check
Tester
500 V mega, visual
inspection
- It should be in a conducting state
- The resistance value should be 1 M
Ω
or more,
there should be no abnormality
- Replace it if it is not in a conducting state
- Replace it if the resistance value is 1 M
Ω
or less
20,000 Hr
Electric component box
(including inverter)
- Circuit insulation resistance check
- Terminal part, connector looseness check
500 V mega
Driver, visual inspection
- The resistance value should be 1 M
Ω
or more
- There should be no looseness at the connecting
part
- Clean with a brush in case of extreme dust adhesion
- Replace it if the resistance value is 1 M
Ω
or less
- Retighten or re-insert it if there is looseness
25,000 Hr
Electrolytic
capacitor
- Capacitor (electrolytic) appearance check
Visual inspection
- There should be no liquid leakage or deformation
- Appearance check, replace it if there is liquid
leakage
Smoothing
capacitor
- Measurement of electrical capacitance and
insulation resistance
- Appearance check
Electrostatic instrument,
500 V mega Tester
- Should be of speci
fi
ed volume or more
- The resistance value should be 1 M
Ω
or more
- Replace parts regularly
- Replace it if the resistance value is 1 M
Ω
or less
10 years
Consumable
components
Terminal
block
- Terminal part screw looseness, deposit of dirt
Driver, visual
inspection
- It should not be loose
- There should be no deposited foreign matter
- Retighten it if it is loose.
- Clean with a brush in case of deposited foreign
matter adhesion
25,000 Hr
Electrical
component
(including
boards, etc.)
- HIC board short circuit check
- Visual check of dirt adhesion to the board, etc.
- Self-diagnosis mode, appearance check
Tester
Visual inspection
Visual inspection
- Should be of a speci
fi
ed resistance value
- There should be no deposited foreign matter
- There should be no abnormal display
- Replace it if it is outside the speci
fi
ed resistance value
- Clean with a brush in case of deposited foreign
matter adhesion
- Replace or correct the part
25,000 Hr
Pressure sensor,
temperature sensor
- Open, short circuit, earth, appearance check
Tester, visual
inspection
- Should be of a speci
fi
ed resistance value
- There should be no cracking or discoloration
- Replace it in case of disconnection and short
circuit
5 years
Switch, etc.
(including
FFB, ELB)
Electromagnetic
switch
Overcurrent relay
Auxiliary relay, etc.
- Operation, appearance check
- Rough contact surface
Visual inspection
Visual inspection
- There should be no deformation
- It should operate as prescribed, there should be
no deformation
- There should be no deformation or discoloration
- Replace it in case of malfunction, deformation, and
discoloration
25,000 Hr
Switching power source
transformer
- Output voltage measurement
Tester
- Output voltage should be within a speci
fi
ed value
- Replace it if there is voltage abnormality
10 years
Cooling fan
- Insulation resistance, abnormal sound generation
500 V mega, audible
inspection
- The resistance value should be 1 M
Ω
or more,
there should be no abnormal sound
- Replace it if the resistance value is 1 M
Ω
or less
- Replace it in case of fan lock
20,000 Hr
Fuse
- Appearance check
Visual inspection
- There should be no deformation or discoloration
- Replace it when it is shutdown
10 years
Consumable
components
Note 1) Random fault is an unexpected failure which occurs before
the wear is progressed, within the service life of the parts and
equipment. It is difficult to establish a technological measure
against the random fault. At the moment, statistical handling is the
only measure against the random fault.
Note 2) The elapsed year marked with * assumes the operating time
as 10 hours/day and 2500 hours/year in a normal operating
condition without frequent start/stop. This may vary according to
the operating condition. Please check the calculation basis of the
elapsed year when making a maintenance contract.
Note 3)
illustrates the estimated timing when the wear-out
failure starts and how the failure rate increases as the time passes.
Explanation of symbols
: Conduct the cleaning and adjustment according to the inspection result
: In case of abnormality after inspection, replace or repair the corresponding part.
: Conduct the periodic replacement (consumable components)
: Random failure
: Wear-out failure
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