SPACER 6B7299 - Caterpillar

Uninterruptible Power Supply: ES12F (S/N: CZE1-UP) UPS 1000S (S/N: CZS1-UP) UPS 1000Z (S/N: EDZ1-UP) UPS 120 (S/N: CNK1-UP) UPS 1200S (S/N: CZT1-UP) UPS 1200Z (S/N: HDR1-UP) UPS 150 (S/N: CPC1-UP) UPS 250 (S/N: BEE1-UP; CNM1-UP; APZ1-UP) UPS 300 (S/N: CNJ1-UP) UPS 301 (S/N: CSY1-UP) UPS 500 (S/N: CSE1-UP) UPS 600 (S/N: CTX1-UP) UPS 750 (S/N: CPM1-UP) UPS 900 (S/N: CRY1-UP) UPS500G (S/N: TYD1-UP) UPS600G (S/N: DLD1-UP)Introduction
This Special Instruction provides the necessary information on diode test procedure to determine the failed Active Power Module (APM) Inverter.Do not perform any procedure in this Special Instruction until you have read this entire Special Instruction and you understand this information.Important Safety Information
Work safely. Most accidents that involve product operation, maintenance, and repair are caused by failure to observe basic safety rules or precautions. An accident can often be avoided by recognizing potentially hazardous situations before an accident occurs.A person must be alert to potential hazards. This person should also have the necessary training, skills, and tools in order to perform these functions properly.Safety precautions and warnings are provided in this instruction and on the product. If these hazard warnings are not heeded, bodily injury or death could occur to you or to other persons. Caterpillar cannot anticipate every possible circumstance that might involve a potential hazard.Therefore, the warnings in this publication and the warnings that are on the product are not all inclusive. Ensure that any tool, procedure, work method, or operating technique you use that is not recommended by Caterpillar is safe.Ensure that the product will not be damaged or the product will be made unsafe by the operation, lubrication, maintenance, or the repair procedures that are used.
Do not operate or work on this machine unless you have read and understand the instructions and warnings in the Operation and Maintenance Manual. Failure to follow the instructions or heed the warnings could result in injury or death. Contact your Caterpillar dealer for replacement manuals. Proper care is your responsibility.
Personal injury or death can result from improper assembly procedures.Do not attempt any assembly until you have read and understand the assembly instructions.
This system must be installed with a disconnect switch that is supplied by the customer and has been rated for the output power.An additional service disconnect device must be installed for the input power when the device is required by local regulations and/or national regulations.
Power source must be disconnected before working on equipment.Failure to disconnect power source could result in injury or death.
High voltage may be present. The power source must be disconnected before working on the equipment. Failure to disconnect the power source could result in injury or death. Verify that the equipment is not energized before performing any maintenance. This work must be performed by trained personnel with correct tools and procedures.
Personal injury or death can result from high voltage.Moisture can create paths of electrical conductivity.Make sure that the electrical system is OFF. Lock out the starting controls and tag the controls "DO NOT OPERATE".
Purpose
The purpose of diode testing the