Troubleshooting
It is important to familiarize yourself with the following information before attempting any
troubleshooting or service of the control. Most troubleshooting can be performed using only a digital
voltmeter having an input impedance exceeding 1 megohm. In some cases an oscilloscope with 5
MHZ minimum bandwidth may be useful. Before consulting the factory, double check that all power
and control wiring is correct and installed per the recommendations given in this manual.
WARNING: THIS EQUIPMENT CONTAINS VOLTAGES WHICH MAY BE AS HIGH AS 800
VOLTS AND ROTATING PARTS ON MOTORS AND DRIVEN MACHINES.
HIGH VOLTAGE AND MOVING PARTS CAN CAUSE SERIOUS OR FATAL
INJURY. ONLY QUALIFIED PERSONNEL FAMILIAR WITH THIS MANUAL
AND ANY DRIVE MACHINERY SHOULD ATTEMPT TO START-UP OR
TROUBLESHOOT THIS EQUIPMENT.
OBSERVE THESE PRECAUTIONS:
USE EXTREME CAUTION, DO NOT TOUCH ANY CIRCUIT BOARD, POWER
DEVICE OR ELECTRICAL CONNECTION WITHOUT INSURING THAT HIGH
VOLTAGE IS NOT PRESENT.
THE UNIT MUST BE PROPERLY GROUNDED. DO NOT APPLY AC POWER
BEFORE FOLLOWING GROUNDING INSTRUCTIONS.
DO NOT OPEN COVER FOR 5 MINUTES AFTER REMOVING AC POWER, TO
ALLOW CAPACITORS TO DISCHARGE.
IMPROPER CONTROL OPERATION MAY CAUSE VIOLENT MOTION OF MOTOR
SHAFT AND DRIVEN EQUIPMENT. BE CERTAIN THAT UNEXPECTED MOTOR
SHAFT MOVEMENT WILL NOT CAUSE INJURY TO PERSONNEL OR DAMAGE TO
EQUIPMENT. PEAK TORQUES OF SEVERAL TIMES RATED MOTOR TORQUE
CAN OCCUR DURING A CONTROL FAILURE.
MOTOR CIRCUIT MAY HAVE HIGH VOLTAGE PRESENT WHENEVER AC POWER
IS APPLIED, EVEN WHEN MOTOR IS NOT ROTATING.
4-7
DIAGNOSTIC INFO AND TROUBLESHOOTING
MN723H-10/95 11/28/95 1:13 AM Page 91 (Black plate)
Summary of Contents for 23H Series
Page 11: ...1 8 GENERAL INFORMATION MN723H 10 95 11 28 95 1 07 AM Page 12 Black plate...
Page 83: ...3 30 KEYPAD PROGRAMMING AND OPERATION MN723H 10 95 11 28 95 1 13 AM Page 84 Black plate...
Page 99: ...4 16 DIAGNOSTIC INFO AND TROUBLESHOOTING MN723H 10 95 11 28 95 1 14 AM Page 100 Black plate...
Page 125: ...5 26 APPENDIX G MN723H 10 95 11 28 95 1 21 AM Page 126 Black plate...
Page 126: ...MN723H 10 95 11 28 95 1 21 AM Page 127 Black plate...