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La Marche A31 Installation Information

Dc to ac sine wave inverter
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INSTALLATION AND TROUBLESHOOTING INFORMATION FOR MODEL A31
CPN40966
18601 – 03/10
ISSUE DATE: 12266 - 8/98
A31
DC TO AC
SINE WAVE INVERTER
ECN/DATE
16816 - 09/05
16651 - 01/05
106 BRADROCK DRIVE
DES PLAINES, IL. 60018
(847) 299-1188
FAX: (847) 299-3061
PAGE 1 OF 15
15884 – 4/03
15349-05 – 6/02
INSTRUCTION DRAWING NUMBER:
P25-
14575 – 2/01
13608 – 1/00
LA31STD-1

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  • Page 1 INSTALLATION AND TROUBLESHOOTING INFORMATION FOR MODEL A31 DC TO AC SINE WAVE INVERTER ECN/DATE CPN40966 16816 - 09/05 15884 – 4/03 14575 – 2/01 18601 – 03/10 16651 - 01/05 15349-05 – 6/02 13608 – 1/00 106 BRADROCK DRIVE DES PLAINES, IL. 60018...

  • Page 2: Important Safety Instructions

    INSTALLATION AND TROUBLESHOOTING INFORMATION FOR MODEL A31 IMPORTANT SAFETY INSTRUCTIONS SAVE THESE INSTRUCTIONS. This manual contains important safety and operating instructions. Before using this equipment, read all instructions and cautionary markings on (1) unit, (2) battery, and (3) product using the battery.
  • Page 3 NOMENCLATURE PLATES Each piece of La Marche Mfg. Equipment shipped is identified by part number on the nomenclature plate. ADJUSTMENTS All equipment is shipped from the factory fully checked and adjusted. Do not make any adjustments unless the equipment has been powered-up and the settings have been determined to be incorrect.

  • Page 4: Output Ratings

    INSTALLATION AND TROUBLESHOOTING INFORMATION FOR MODEL A31 GENERAL The La Marche Model A31 is a transistorized DC to AC inverter designed to power an AC load. The Model A31 will provide a sine wave output with approximately 5% total harmonic distortion into AC loads with power factors up to .8 over a wide DC input range.
  • Page 5 183,000 hrs at 50 C. 3.0 INPUT RATINGS INPUT VOLTAGE The nominal DC input voltages are 24, 48 and 120 volts. The Model A31 will operate within specifications over a range of 1.75 volts/cell to 2.65 volts/cell (lead battery). INPUT CURRENT See chart on specification sheet for input current ratings at nominal DC input voltages.
  • Page 6 INSTALLATION AND TROUBLESHOOTING INFORMATION FOR MODEL A31 ENVIRONMENTAL RATINGS OPERATING AMBIENT TEMPERATURE RANGE 0-50 degrees C (32-122 degrees F) STORAGE TEMPERATURE RANGE -40 degrees C to +60 degrees C (-40 degrees F to +140 degrees F) HUMIDITY This unit is capable of operating in an ambient relative humidity range of 0-95% (non-condensing).

  • Page 7: Field Ground Terminal

    INSTALLATION AND TROUBLESHOOTING INFORMATION FOR MODEL A31 FIELD GROUND TERMINAL This terminal should be connected to an earth ground. The size of the conductor is based on National Electric Code Table 250-95 for copper wire at 75 degrees C FIELD GROUND & LINE NEUTRAL A jumper is supplied which connects the bypass line and the inverter output neutral together.
  • Page 8 START - UP The start-up procedure will guide you on how to safely power up an A31 Inverter with or without a static switch and to confirm the utility power wiring to the inverter. (INVERTER PRIME) If the inverter has a 1 millisecond static switch, Option codes 22P or 22S, it will have a S2A-239A circuit board.
  • Page 9 A31 IGBT DRIVER BOARD (S2A-297 or S2A-306) (Used with IGBT Transistors) A31 IGBT Drive Board receives the signals from the oscillator/line sync. printed board (S2A-167). These signals are amplified and converted to signals, which are able to drive IGBT modules.
  • Page 10 B. Shorted C1, C2 or C4 Capacitor. C. Defective A31 oscillator/line sync. printed circuit board (S2A-167) D. Defective A31 drive/snubber printed circuit board S2A-165 for BI-Polar Transistor Module Only or S2A-297 or S2A-306 card for IGBT Module. E. Defective transistor module or IGBT Module F.

  • Page 11: Voltage Test Points

    E. TS-2 Pin Number 1 AC line bypass phase, Pin Number 2 AC line bypass Neutral. Pin Number 5 to Pin Number 6, AC output voltage of the A31 Inverter (120Vac). F. LED 1, Phase lock LED, If two sources are insync. LED will light.
  • Page 12 H. LED 3, high voltage shutdown when lit. NOTE: An open fuse on this board indicates a defective board. A31 drive/snubber printed circuit board (S2A-165), (S2A-306) & (S2A-297) A. Need special test equipment, recommend sending printed circuit board to the factory.
  • Page 13 INSTALLATION AND TROUBLESHOOTING INFORMATION FOR MODEL A31 C. Check the status on the three LED’s located on the S2A-167 p.c. board. Low or high DC input voltage, look at the rectifier. D. Check the F1 and F2 fuse on the S2A-167 printed circuit board, if open defective p.c. board. Also look at R1 and R2 transistor modules and the two fuses located on the S2A-165 p.c.
  • Page 14 INSTALLATION AND TROUBLESHOOTING INFORMATION FOR MODEL A31 General Maintenance Procedure Yearly 1. Blow out rectifier/inverter with a low-pressure air hose. 2. Make sure all connections are tight. 3. Perform a visual check on all internal components. 4. Check front panel meters and alarms for accuracy.

  • Page 15: Manufacturer's Warranty

    (5) years after date of purchase. During the last four (4) years of this five (5) year warranty period, the warranty covers parts replacement only, and no labor or other services are provided by La Marche, nor is La Marche obligated to reimburse the owner or any other person for work performed.

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