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La Marche Manufacturing Company
www.lamarchemfg.com
A31
DC – AC Sine Wave Inverter
Installation and Operation Manual
This manual is subject to change without notice. You may obtain the newest version of the manual at www.lamarchemfg.com
106 Bradrock Dr. Des Plaines, IL 60018-1967
CPN 40966
Instruction Drawing Number: P25-LA31STD-1
Tel: 847 299 1188
Fax: 847 299 3061
Revision A08
Rev. Date: 01/21
ECN: 22782
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Table of Contents
Troubleshooting
Related Manuals for La Marche A31
Summary of Contents for La Marche A31
- Page 1 La Marche Manufacturing Company www.lamarchemfg.com DC – AC Sine Wave Inverter Installation and Operation Manual This manual is subject to change without notice. You may obtain the newest version of the manual at www.lamarchemfg.com 106 Bradrock Dr. Des Plaines, IL 60018-1967...
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Page 2: Electrical Safety
Important Safety Instructions Before using this equipment, read all manuals and other documents related to this inverter and other equipment connected to this inverter. Always have a copy of an inverter’s manual on file nearby, in a safe place; if a replacement or latest copy of a manual is needed, it can be found at www.lamarchemfg.com. -
Page 3: Inverter Location
If any damage is observed, take pictures and contact the carrier immediately to file a damage claim. Contact La Marche for a Return Material Authorization number to have the inverter sent back for evaluation and repair. -
Page 4: Table Of Contents
Handling ..............................ii Table of Contents ............................iii Model Scope/General Description ........................1 Understanding the Model Number ......................... 1 Equipment Handling .......................... 2 Storing the A31 ..........................2 Moving the A31 ..........................2 Installation ............................2 Mounting the A31.......................... 2 2.1.1 Rack-Mounting the A31 ...................... -
Page 5: Model Scope/General Description
DC input is not within the proper range. Understanding the Model Number The A31 model number is coded to describe the features that are included. Find the model number on the nomenclature nameplate of the inverter. Follow the chart below to determine the configuration of the inverter. -
Page 6: Equipment Handling
Storing the A31 If the A31 is to be stored for more than a few days after delivery, it should be stored within its shipping container. The location chosen for storage should be within an ambient temperature of -40 to 140°F (-40 to 60°C) with a non-condensing relative humidity of 0 to 95%. -
Page 7: 2.1.1 Rack-Mounting The A31
2.1.1 Rack-Mounting the A31 The A31 can be installed in most relay racks with standard EIA hole spacing. If a relay rack is needed, they are available for purchase from La Marche. The 9D, 9E, 33, and 39 enclosures are shipped from the factory with... -
Page 8: 2.1.2 Floor-Mounting The A31
2.1.2 Floor-Mounting the A31 Floor-Mounting Procedure Floor-mounting the 70, 72, 44, and 47B enclosures is standard. To floor-mount the A31, install four anchor bolts into the floor. Place the inverter on the anchor bolts, add appropriate mounting hardware, and tighten securely. -
Page 9: Making The Dc Input Connections
Table 4 – AC/DC & Ground Wire Size Minimum Requirements (All wires specified in the table are rated at 90 °C or 194 °F) NOTE: These are recommended sizes per La Marche Standards. The National Electrical Code (NEC) and Local Wiring Codes must be followed. -
Page 10: Making The Ac Output/Ac Bypass Line Connections
Checking the Installation Before attempting to start up the A31, check and verify that all connections are correct. Check that all terminations and contacts are tightened securely. Check for any loose connections or unsecured components in the inverter. - Page 11 For Standard Inverters (No Static Switch): 1. Push and hold the Pre-Charge button until the green READY LED illuminates. 2. Release the Pre-Charge button and immediately turn on the DC breaker, then turn the inverter ON/OFF switch (SW-1) to the ON position. The inverter should begin to emit a humming sound. 3.
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Page 12: Led Indicators
The LED will turn off and the inverter output will once the low DC voltage condition is no longer present. Factory Settings All A31 inverters are set at the factory based on the model number with the following settings: Low DC Voltage Shutdown: 1.73 V/C for LA 1.10 V/C for NC... -
Page 13: Service
Before working inside the A31, ensure the AC power is off at the main breaker box and the battery has been removed from the inverter’s DC input terminals, either by removing the battery cables or exercising the battery disconnect. -
Page 14: Troubleshooting Procedure
La Marche Service Technicians are available to help with troubleshooting or with scheduling inverter service. When calling for a service inquiry or for troubleshooting assistance, be sure to have all of the following information on hand: 1. -
Page 15: Troubleshooting Chart
Troubleshooting Chart Isolate from all power sources prior to performing any interior verifications or part replacements. Symptom Possible Cause Overload Condition Shorted Equipment or Component on AC output Inverter AC Breaker Trips Defective AC Breaker Shorted SCRs (if applicable) Capacitor Pre-Charge Circuitry Improperly Used Defective C1, C2, or C4 Capacitor Defective S2A-167S Oscillator/Line Sync Board Defective S2A-297/S2A-306 IGBT Drive Board... - Page 16 Ordering Replacement Parts Contact La Marche to place an order for spare or replacement parts. To order replacement parts; please provide the model and serial number of the battery inverter, the parts needed, and the quantity required. SCR Modules The procedure for checking the SCR module is as follows: ➢...
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Page 17: Appendix A: A31 Specifications
Appendix A: A31 Specifications ELECTRICAL 24VDC: 21 – 30VDC 48VDC: 42 – 60VDC DC Input Voltages 120VDC: 105 – 150VDC Voltage Range: ± 10% from nominal AC Output Voltage: 1 Phase – 120VAC (Standard), 208VAC, 220VAC, 240VAC AC Output AC Output Power: 1000VA – 15000VA (0.8 lagging factor) Line Regulation: ±3% over DC battery range... -
Page 18: Appendix B: Power Wiring Guide
Appendix B: Power Wiring Guide Use the following formulas and table to determine proper wire size for minimal voltage drop. At distances exceeding 10 feet, the DC wire size should be chosen to keep the voltage difference between the inverter’s DC input terminals and the battery at less than 1/2 volt when the inverter is fully loaded. -
Page 19: Appendix C: Manufacturer's Standard Warranty
If the Extended Warranty is purchased, the parts required for repair will also be at no cost but La Marche will notify the Purchaser of the costs of Labor to replace the defective part(s). -
Page 20: Appendix D: Manufacturer's Extended Parts Warranty
Should minor adjustments be required, the local La Marche sales representative should be contacted to provide this service only. All sales are final. Only standard La Marche units will be considered for return. A 25% restocking fee is charged when return is factory authorized. Special units are not returnable. -
Page 21: Appendix E: Document Control And Revision History
Appendix E: Document Control and Revision History Part Number: 40966 Instruction Number: P25-LA31STD-1 Issue ECN: 12266 - 08/98 22782 – 01/21 18601 – 03/10 16816 – 09/05 16651 – 01/05 15884 – 04/03 15349-05 – 06/02 14575 – 02/01 13608 – 01/00...
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