La Marche A75M Instruction

PAGE 1 OF 13 MODEL A75M MINING BATTERY CHARGER Digital Volt/Amp Meter and Electronic Timer ECN/DATE CPN112410 17268 / 10-06 17589 / 9-07 17076/ 2-06 106 BRADROCK DRIVE DES PLAINES, IL. 60018-1967 (847) 299-1188 FAX: (847) 299-3061 ISSUE DATE: ECN- 17046 / 2-06 INSTRUCTION DRAWING NUMBER: P25-LA75M-1 ...

PAGE 2 OF 13 1. 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. 2. CAUTION: To reduce risk of injury and/or damage to the batteries, use only the type of batteries specified on the charger nameplate. 3. Do not expose equipment to rain or snow. 4. Do not operate equipment if it has received a sharp blow, been dropped, or otherwise damaged in any way; take it to a qualified serviceman. 5. Do not disassemble this unit; take ...

PAGE 3 OF 13 RECEIVING INSTRUCTIONS AND GENERAL EQUIPMENT INFORMATION CAUTION: To ensure safe installation and operation, the information given in the instruction manual should be read and understood before installing or using the equipment. RECEIVING INSTRUCTIONS Unpacking and Inspection: Examine the shipping crate upon arrival. If there is obvious damage, describe on the receiving documents. Within a few days after delivery, the equipment should be uncrated and carefully inspected for hidden damages. When removing packaging material, be careful not to discard any equipment, parts, or manuals. I ...

PAGE 4 OF 13 MODEL A75M BATTERY CHARGER The Model A75M is a SCR controlled industrial battery charger for use on electric vehicle batteries. It is designed to recharge a battery of the proper amp-hour capacity in eight hours. The Model A75M features: * SCR based control * Automatic start/stop circuitry * Automatic Sensing of Fully-Charged Battery * Automatic 12 hour override timer * 3 Hour timing after 80% (normal mode) * 6 Hour timing after 80% (equalize mode) * 3 Selectable current ratings * Digital Display - Indicates amps, volts, amp hours, elapsed time, cooling time * "On Charge", "80%/Complete" ...

PAGE 5 OF 13 THEORY OF OPERATION & INDICATORS FRONT PANEL The panel has a digital display, meter select/equalize (EQ) momentary switch, on/off switch and eight (8) LED lamps. The digital display indicates Output Amps, Output Voltage, Ampere Hours Returned, and Elapsed Time Charging and Cooling Time (elapsed time from end of charge). A "Meter Select” switch and associated indicator lights allow you to read any one of the four (4) operating parameters on the digital display. After powering up the unit and connecting the battery, the digital display indicates the output amperage of the charger. Pre ...

PAGE 6 OF 13 The Model A75M charger accomplishes its charge cycle completely automatically without the use of any moving parts except for the input AC contactor. It is recommended that the connector used for the battery/charger connection have an auxiliary control contact. (A contact that makes last and breaks first.) This contact should be wired to the battery positive on the battery side of the connector and to Pin #2 of the terminal strip on the charger side of the connector. (The jumper bar between Pins 1 and 2 must be removed when using the auxiliary control contact.) An SCR regulator controls ...

PAGE 7 OF 13 lamp will light and the display will indicate "0004." If this occurs, the unit will not autostart. The on/off switch will have to be turned off to reset the lights and turned back on to initiate the autostart mode. After starting, the SCR immediately activates the 12 hour override timer. This timer is independent of battery conditions and overrides all other timing functions. The override timer will terminate the charge in the event that the rate control or the 80% timing control does not terminate the charge before the maximum time limit of 12 hours is reached. If the AC input line f ...

PAGE 8 OF 13 START-UP A. Place the on/off switch to the "ON" position. Apply AC voltage to the units input terminals. Four (4) eight's ("8888") will flash on the display. B. To select the equalize charge mode, activate the "EQUALIZE" switch on the front panel. If the equalize mode is selected, the "EQUALIZE" LED will be on. C. Connect the battery to the charger. After a 20 second delay, which assures proper battery connection, the AC contactor should close and the on charge light should turn on. The battery charger should start to charge, showing output amps on the digital display. This comple ...

PAGE 9 OF 13 A75M TROUBLESHOOTING INSTRUCTIONS Before troubleshooting unit, check for shipping damage. (i.e. broken wires, loose connections, etc.) Quick-Check A75M Trouble Analysis Problem: Blown AC input fuse. 1. Check AC input voltage with tap setting on power transformer and control transformer. If AC input and tap setting agree, see step #2. 2. Check AC input current draw after replacing blown AC fuse. NOTE: If AC fuse clears as soon as the AC contactor pulls in, go to STEP #5. On three (3) phase units, if the AC current is not approximately equal, check the AC voltage input to the S2A-123 p ...

PAGE 10 OF 13 NOTE: Blown printed circuit boards, fuses or loose printed circuit boards fuses could cause an out of phase condition. (Blowing AC input fuses) If a blown printed circuit board fuse is found, a wire on the gate lead of the SCR/Diode module could be disconnected or a defective SCR/Diode module could exist. Problem: Blown DC fuse. 1. Make sure the correct type of fuse is being used. 2. Check all connections to DC fuse to be certain they are tight. 3. Check polarity of output cables, output connector, SCR/Diodes module and diode SD4 for shorts. Problem: Blown control transformer fuse CT ...

PAGE 11 OF 13 Problem: Failure light on CODE 0003. 1. Check battery for correct number of cells. 2. Check for defective or shorted cells in battery. 3. Open circuit battery voltage must be above 1.6Vpc.. Problem: Failure light on CODE 0004. 1. Check battery for defective or shorted cells. 2. S2A-320 or FC6 "p.c." board may be defective. 3. 80% setting came on late into the charge cycle, batteries are being discharged beyond specifications. Problem: Fuses, battery, AC voltage and taps okay, but no indication on display board. Defective S2A-191 board, replace board. TROUBLESHOOTING SCR/DIODE MODULES ...

PAGE 12 OF 13 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. 4th Year REPEAT ABOVE WITH THE ADDITION OF: 1. Check relay contacts for pitting or corrosion. 2. Check capacitors for leakage. 7th Year REPEAT ALL, WITH THE ADDITION OF: 1. Filter, resonating capacitors and control relays should be replaced. 10th Year REPEAT ALL WITH THE ADDITION OF: (except replacing capacitors & control relays, they should be re ...

PAGE 13 OF 13 MANUFACTURER’S WARRANTY All La Marche Manufacturing Co. equipment has been thoroughly tested and found to be in proper operating condition upon shipment from the factory and is warranted to be free from any defect in workmanship and material that may develop within one year from date of purchase. In addition to the standard one (1) year warranty, La Marche warrants its magnetics on a parts replacement basis only for four (4) more years under normal use. Any part or parts of the equipment (except fuses, DC connectors and other wear-related items) that prove defective within a one (1) y ...