4.0 DIAGNOSTICS AND TROUBLESHOOTING
Contents
1. 4 0 DIAGNOSTICS AND TROUBLESHOOTING This section explains how to troubleshoot the Power Supply module and Rack Any problems with either the Power Supply module or the Rack can usually be isolated by observing the condition of the LEDs on the Power Supply module faceplate Problems with the Rack backplane bus will result in error codes on the LEDs of Processor modules In the Rack See J 3650 for more information on troubleshooting the AutoMax Processor module See J 3668 for more information on troubleshooting the DCS 5000 Processor DANGER THE POWER SUPPLY MODULE OPERATES USING A C INPUT VOLTAGE CA PABLE OF PRODUCING SEVERE SHOCK MAKE CERTAIN THAT THE EX TERNAL AC SUPPLY CIRCUIT IS TURNED OFF BEFORE INSERTING OR RE MOVING THE MODULE OR ANY CONNECTING WIRES FAILURE TO OB SERVE THIS PRECAUTION COULD RESULT IN SERIOUS BODILY INJURY OR LOSS OF LIFE If the problem cannot be determined using the troubleshooting Instructions below the hardware is not user serviceable DANGER SOME OF THESE STEPS ARE MADE WITH POWER ON EXERCISE EX TREME CAUTION BECAUSE HAZARDOUS VOLTAGE EXISTS FAILURE TO OBSERVE THIS PRECAUTION COULD RESULT IN SEVERE BODILY INJURY OR LOSS OF LIFE 4 1 The POWER ON LED Is Off Problem the POWER ON LED on the Power Supply module is off This LED should always be on when input power is on If the LED Is off the module Is not receiving 115 VAC power Use the following procedure to isolate the problem S2. from the terminal strip Step 5 Remove the module from the Rack and verify that card edge connectors are clean and that the connectors on the backplane are in good condition Step 6 Re insert the Power Supply module Use a screwdriver to re connect the terminal strip to the Power Supply module Turn on power to the rack If the problem is not corrected replace the Rack The SYSTEM READY LED Is Off Problem the SYSTEM READY LED on the Power Supply module is off This LED should always be on when input power is on and all Processor modules in the Rack are operating correctly The light will go off if the OK LEDs on any Processors in the Rack go off Check the OK LEDs on all Processor modules in the Rack Troubleshoot the Processor s whose LEDs are off Verify that the Power Supply output Is sufficient to power ail of the modules in the Rack by checking the total power requirements of the modules in the Rack against the Power Supply output 4 4 The BLOWN FUSE LED Is On Problem the BLOWN FUSE LED on the Power Supply module Is on This LED should always be off Use the following procedure to Isolate the problem CAUTION THE FUSE MUST BE REPLACED ONLY BY ANOTHER 250V 8AMP NORMAL BLOW FUSE FAILURE TO OBSERVE THIS PRECAUTION COULD RESULT IN DAMAGE TO OR DESTRUCTION OF THE EQUIPMENT Step 1 Turn off power to the Rack Step 2 Wait until all of the LEDs on the faceplate of the Power Supply module have gone out Use a screwdrive
3. r to release the fuse holder labeled FUSE located on the Power Supply module faceplate Pull the fuse holder out of the module Step 3 Take the old fuse out of the fuse holder and replace with the new fuse Step 4 Re insert the fuse holder into the module Turn the screwdriver clockwise and press down on the fuse holder at the same time The fuse holder must be flush against the faceplate 4 3
4. tep 1 Using a voltmeter verify that the Rack Is receiving 115 VAC power Step 2 Turn off power to the Rack Wait until all of the LEDs on the faceplate of the Power Supply module have gone out Verify that the connections at the Rack and the L1 and L2 connections at the Power Supply module are tight Step 3 Turn on power to the Rack If the problem Is not corrected replace the Power Supply 4 1 4 2 4 2 4 3 The P S READY LED Is Off Problem the P S READY LED on the Power Supply module is off This LED should always be on when input power is on If the LED is off use the following procedure to isolate the problem Step 1 Turn off power to the Rack and all connections Step 2 Wait until alt of the LEDs on the faceplate of the Power Supply module have gone out Use a screwdriver to loosen the screws holding the Power Supply module in the Rack Slide the module out about one inch to insure that the backplane connections have been broken Do not take the module out of the Rack Step 3 Turn on power to the Rack If the P S READY LED turns on the problem lies in the Rack backplane Go on to step 4 If the P S READY LED does not light the Power Supply module is malfunctioning and needs to be replaced Step 4 Turn off power again Wait until all of the LEDs on the faceplate of the Power Supply module have gone out Use a screwdriver to disconnect the terminal strip from the Power Supply module Do not remove the wires
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