AB Quality ALLEN-BRADLEY 1391-DES, User Manual

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11
Chapter
11-1
Troubleshooting
Chapter Objectives
Chapter 11 provides information to guide the user in troubleshooting the
1391-DES. Included in the chapter are board and drive substitution
procedures, fault indications, general system faults and test point
descriptions.
System Troubleshooting
Most drive faults are annunciated by fault messages on the front panel
display. Many system malfunctions manifest themselves through a drive
fault. The troubleshooting information provided will take advantage of the
fault messages and list a number of potential system problems related to
each. In addition, a number of common system and motor malfunctions are
described.
ATTENTION: This product contains stored energy devices. To
avoid hazard of electrical shock, verify that all voltage on the
capacitors has been discharged before attempting to service,
repair or remove this unit.
Voltage at terminals 9 (+) and 7 (–) of TB5 must be “0.00” as
measured with a standard digital voltmeter or multimeter.
Only qualified personnel familiar with solid-state control
equipment and safety procedures in publication NFPA 70E
should attempt this procedure.
!
!
ATTENTION: Do not attempt to defeat or override the drive
fault circuits. The cause of a fault indication must be determined
and corrected before attempting operation. Failure to correct a
drive or system malfunction may result in personal injury and/or
equipment damage due to uncontrolled machine system
operation.
!
ATTENTION: If an oscilloscope (or chart recorder) is used for
troubleshooting, it must be properly grounded. The oscilloscope
chassis may be at a potentially fatal voltage if not properly
grounded. Always connect the oscilloscope chassis to earth
ground.