GE AF-300 P11, User Manual

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8-1
Data subject to change without notice 7/07. © 2007 GE Drives
8. Maintenance and Inspection
Proceed with daily inspection and periodic inspection to prevent malfunction and ensure long-term reliability. Some tips
regarding things to look for during these inspections are listed below.
8.1 Daily Inspections
During operation, a visual inspection for abnormal operation can take place externally without removing the covers.
The inspection should cover the following areas:
(1) The performance, according to standard specifications,
is as expected.
(2) The environment conforms to standard specifications.
(3) The keypad panel display is normal.
(4) There are no abnormal sounds, vibrations, or odors.
(5) There are no indications of overheating or discoloration.
8.2 Periodic Inspections
Periodic inspections should be made after stopping operations, cutting off the power source, and removing the surface
cover.
Note that after turning off the power, the smoothing capacitors in the DC section of the main circuit take time to dis-
charge. To prevent electric shock, confirm with a multimeter that the voltage has dropped below the safety value (25 V
DC or below) after the charge lamp (CRG) goes off.
WARNING
• Start the inspection at least five minutes after turning off the power supply for inverters rated at 30
Hp or less. Wait at least ten minutes for inverters rated at 40 Hp or more. Check that the charge
lamp (CRG) went off and that the voltage is 25V DC or less between terminals P(+) and N(-). Electric
shock may result.
• Only authorized personnel should perform maintenance and component replacement operations.
Remove metal jewelry such as watches and rings, and always use insulated tools.
• Never modify the drive. Electric shock or injury may result.