Mitsubishi Electric EZMotion-NC E60 Series, Operation Manual

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6. Daily Maintenance and Periodic Inspection and Maintenance
6.1 Maintenance Tools
III -35
6. Daily Maintenance and Periodic Inspection and Maintenance
6.1 Maintenance Tools
(1) Measuring instruments
The following measuring instruments are used to confirm that the voltage is being supplied correctly
to the NC unit, to confirm that the wiring to the NC unit is correct, and to carry out simple
troubleshooting.
Tool Condition Application
Tester To check that the wiring to the NC unit is correct
before turning the power ON.
AC voltmeter
The tolerable error is
±
2%
or less.
To measures the AC power voltage being
supplied to the external 24VDC power supply
unit.
DC voltmeter The tolerable error is
±
2%
or less.
To measure the DC power voltage.
Voltage supply to connector DCIN (control unit,
base I/O unit)
Battery voltage
Synchroscope General measurement and simple
troubleshooting
(Note 1) Currently, a high-accuracy digital multi-meter is commonly used as a tester. This digital
multi-meter can be used as both an AC voltmeter and an DC voltmeter.
(2) Tools
Screwdriver (large, medium, small)
Radio pliers
6.2 Maintenance Items
Maintenance is categorized into daily maintenance items (items to be carried at set intervals) and
periodic maintenance items (replacement of parts when life is reached).
Some parts will not function in a hardware manner when the life is reached, so these should be
replaced before the life is reached.
Class Name Life Inspection/replacement Remarks
Daily
maintenance Escutcheon
Keyboard cleaning
Once/two months
(Accordingly when dirty)
Periodic
maintenance Battery
(lithium battery) Cumulative data
holding time
50,000 hr When battery voltage
drop caution alarm occurs
(Guideline: approx. 5
years) Refer to
Section
6.3.2 (1).
CRT (when using
FCU6-DUE71 display
unit) 7,000 hr Replace when CRT
darkens.
CRT (when using
FCU6-DUT11 display
unit) 20,000 hr Replace when CRT
darkens.
LCD (when using
FCU6-DUN24 display
unit)
40,000 hr Replace when LCD
darkens.
It is not possible
to replace only
the backlight.