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8 Maintenance and Inspection
Execute the daily inspection and periodic inspection for preventing a fault and ensuring long-term reliability.
Note the following regarding the work.
8-1 Daily Inspection
During the operation and conduction, the visual inspection for abnormal operation is executed from the outside
without removing the covers.
Inspections are usually done to check the following:
1) The expected performance (satisfying the standard specification) is obtained.
2) The environment satisfies the standard specification.
3) The keypad panel display is normal.
4) There are no abnormal sound, vibrations or unpleasant odors.
5) There are no overheating marks or discoloration.
8-2 Periodic Inspection
The periodic inspection must be executed after stopping the operation and cutting off the power source and re-
moving the surface cover.
After power-off, time is needed for the smoothing capacitors in the DC section in the main circuit to discharge.
To prevent electric shock, make sure that the voltage falls down to the safety value (25Vdc and below) using a
multimeter after the charge lamp (CRG) goes off.
!
WARNING
1. Start inspection five minutes or more after turning off the power supply. (Check that the charge lamp
(CRG) goes off, and check the voltage is 25V dc or below between terminals P(+) and N(-)
There is danger of electric shock.
2. Only the designated person can perform the maintenance and replace components
(Take off any metal objects such as a watch or ring.)
(Use insulated tools.)
3. Never modify the drive.
There is danger of electric shock or injury.