Mitsubishi RC-E5 User Manual page 22

Part Name
Part Name Details of Inspection
- Conductivity check
Crankcase heater - Insulation resistance measurement
- Appearance check
- Conductivity check
Anti-freezing heater - Insulation resistance, appearance check
- Circuit insulation resistance check
Electric component box
(including inverter) - Terminal part, connector looseness check
Electrolytic - Capacitor (electrolytic) appearance check
capacitor
- Measurement of electrical capacitance and
Smoothing
insulation resistance
capacitor
- Appearance check
- Terminal part screw looseness, deposit of dirt
Terminal
Electric and
block
electronic
parts
Electrical - HIC board short circuit check
component - Visual check of dirt adhesion to the board, etc.
(including
boards, etc.) - Self-diagnosis mode, appearance check
Pressure sensor, - Open, short circuit, earth, appearance check
temperature sensor
Electromagnetic - Operation, appearance check
Switch, etc. switch
(including Overcurrent relay - Rough contact surface
FFB, ELB)
Auxiliary relay, etc.
Switching power source - Output voltage measurement
transformer
- Insulation resistance, abnormal sound generation
Cooling fan
- Appearance check
Fuse
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.
Regular Inspection
Inspection Method Criteria <Standard>
Tester - It should be in a conducting state
500 V mega - The resistance value should be 1 M or more
Visual inspection - There should be no abnormality
Tester - It should be in a conducting state
500 V mega, visual - The resistance value should be 1 M or more,
inspection there should be no abnormality
500 V mega - The resistance value should be 1 M or more
Driver, visual - There should be no looseness at the connecting
inspection part
Visual inspection - There should be no liquid leakage or deformation
Electrostatic - Should be of specifi ed volume or more
instrument, 500 V - The resistance value should be 1 M or more
mega Tester
Driver, visual - It should not be loose
inspection - There should be no deposited foreign matter
Tester - Should be of a specifi ed resistance value
Visual inspection - There should be no deposited foreign matter
Visual inspection
- There should be no abnormal display
Tester, visual - Should be of a specifi ed resistance value
inspection - There should be no cracking or discoloration
Visual inspection - There should be no deformation
Visual inspection - It should operate as prescribed, there should be no
deformation
- There should be no deformation or discoloration
Tester - Output voltage should be within a specifi ed value
500 V mega, audible - The resistance value should be 1 M or more,
inspection there should be no abnormal sound
Visual inspection - There should be no deformation or discoloration
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.
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)
Preventive Maintenance*
Inspection Maintenance Interval
Details of Maintenance
Interval (Used Hours/Duration)
- Replace it if it is not in a conducting state
- Replace it if the resistance value is 1 M or less
- Replace it if it is not in a conducting state
- Replace it if the resistance value is 1 M or less 20,000 Hr
- Clean with a brush in case of extreme dust adhesion
- Replace it if the resistance value is 1 M or less
- Retighten or re-insert it if there is looseness
25,000 Hr
- Appearance check, replace it if there is liquid
leakage
- Replace parts regularly
- Replace it if the resistance value is 1 M or less 10 years
- Retighten it if it is loose.
Every year
- Clean with a brush in case of deposited foreign 25,000 Hr
Before
matter adhesion
the air-
conditioning
- Replace it if it is outside the specifi ed resistance value
season
- Clean with a brush in case of deposited foreign
25,000 Hr
matter adhesion
- Replace or correct the part
- Replace it in case of disconnection and short
circuit
- Replace it in case of malfunction, deformation, and
discoloration
25,000 Hr
- Replace it if there is voltage abnormality
10 years
- Replace it if the resistance value is 1 M or less
20,000 Hr
- Replace it in case of fan lock
- Replace it when it is shutdown
10 years
Note 3) illustrates the estimated timing when the wear-out
failure starts and how the failure rate increases as the time passes.
: Random failure
: Wear-out failure
Elapsed Years
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15

8 years






5 years




Remarks
Consumable
components
Consumable
components
Consumable
components
21