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PORTABLE SCR REGULATED
PLEASE SAVE THESE IMPORTANT SAFETY AND OPERATING INSTRUCTIONS
To be able to troubleshoot safely and effectively, it is important
to read this guide COMPLETELY before beginning any tests.
LOOK FOR THIS SYMBOL TO POINT OUT SAFETY PRECAUTIONS. IT MEANS:
BECOME ALERT—YOUR SAFETY IS INVOLVED. IF YOU DO NOT FOLLOW THESE
SAFETY INSTRUCTIONS, INJURY OR PROPERTY DAMAGE CAN OCCUR.
CAUTION:
REPAIRS
PERSONNEL ONLY. NOTE: MODIFYING THIS
CHARGER FOR USE OTHER THAN THAT FOR
WHICH
IT
WAS
INTENDED,
PERSONS NOT QUALIFIED, OR NOT USING
ORIGINAL EQUIPMENT REPLACEMENT PARTS
WILL VOID THE MANUFACTURER'S WARRANTY
AND LIABILITY.
INCORRECT REASSEMBLY
MAY RESULT IN A RISK OF ELECTRIC SHOCK
OR FIRE.
CAUTION: DO NOT EXPOSE CHARGER TO
WATER, RAIN OR POWERWASH.
DANGER: HAZARD OF ELECTRIC SHOCK!
ALWAYS UNPLUG THE ELECTRICAL CORDS,
FIRST FROM THE AC OUTLET, AND THEN FROM
THE
CHARGER
RECEPTACLE,
ATTEMPTING ANY REPAIRS OR SERVICE TO
THE CHARGER. TURNING THE CHARGER OFF
DOES NOT REDUCE THIS RISK.
WARNING:
DO
CHARGER
IF
IT
PERSONAL INJURY OR PROPERTY DAMAGE
COULD RESULT.
Technician Service Guide
BATTERY CHARGER
TECHNICIAN SERVICE GUIDE
BY
QUALIFIED
REPAIRS
BY
BEFORE
NOT
OPERATE
THE
IS
MALFUNCTIONING.
WARNING: DO NOT TOUCH THE BATTERY
TERMINALS OR CONTACTS ON THE CHARGING
PLUG. AN ELECTRIC SHOCK COULD RESULT.
This service guide applies to most portable style
SCR regulated charger designs but not all.
service guide does not cover railroad or heavy
industrial styles of chargers.
factory for assistance if there is doubt regarding the
appropriate service guide for a specific model of
charger.
The battery charger is, at most, one third (1/3) of the
complete system, which includes the equipment, the
batteries, and the wiring to/from and between the
batteries.
To locate and correct a problem with
certainty, initial diagnosis and testing must include
all elements of the system.
constructed so all parts can be tested and replaced
with basic hand tools.
See the appropriate owners manual, the model
number listed on the owners manual should match
the model number on the faceplate of the charger,
for detailed installation, operating procedures and
safety
precautions.
PRECAUTIONS.
1
*33367*
This
Please contact the
The charger is
FOLLOW
ALL
SAFETY
33367B
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Table of Contents
Related Manuals for Lester 33367
Summary of Contents for Lester 33367
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Page 1: Table
*33367* PORTABLE SCR REGULATED BATTERY CHARGER TECHNICIAN SERVICE GUIDE PLEASE SAVE THESE IMPORTANT SAFETY AND OPERATING INSTRUCTIONS To be able to troubleshoot safely and effectively, it is important to read this guide COMPLETELY before beginning any tests. LOOK FOR THIS SYMBOL TO POINT OUT SAFETY PRECAUTIONS. IT MEANS: BECOME ALERT—YOUR SAFETY IS INVOLVED. - Page 2 To discourage end users from disassembling the BATTERY TYPES charger, Underwriters Laboratories and Canadian Standards Association require that the internal Battery manufacturers frequently use the same replaceable fuses be omitted from the Owners battery cases different battery types. Manual wiring diagram and parts list for specific Replaceable liquid electrolyte deep-cycle batteries models.
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Page 3: Table Of Contents
7. Remove personal metal items such as rings, may not represent the actual minimum voltage, which may be lower. bracelets, necklaces and watches when working with a lead-acid battery or charger. A lead-acid battery can produce a short-circuit current high Charger Nameplate Typical DC Voltage enough to weld a ring or the like to metal,... - Page 4 the same point inside the charger where the BLACK (-) DC cord lead connects. Test points E & F on the service wiring diagram. Connect the DC output cord to the equipment charging receptacle and record the DC voltage measured. See figure 1. Figure 2 If the DC voltage measured at the electronic timer edge connector or flag terminals is correct, testing of...
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Page 5: B Indicator Lights Illuminate But
Measure and record the AC line voltage at the transformer auxiliary coil test indicates proper AC charger power switch. voltage output or the indicator lights still do not illuminate after transformer replacement, Connect the AC power plug to a live electrical outlet electronic timer must be repaired or replaced. -
Page 6: Charger Does Not Turn Off
DC circuit” proceed to Section 3, Part A, Test for If the measured voltage increase on the batteries correct transformer output coil voltage. If the indicates the full on-charge voltage when the charger turns on, the source of the high resistance transformer output coil voltage test indicates a failed must be corrected to obtain proper charging. -
Page 7: A Does Not Turn Off
charge rate is noted and the findings of the Test for 1. An accurate hydrometer can be used to battery voltage increase are normal, an SCR may determine cessation of the electrochemical have failed. Each charger has two SCRs. charging reaction. If the measured specific gravity of several cells does not increase in three (3) consecutive readings taken one hour... -
Page 8: Transformer Testing
measured voltage indicates transformer has failed, indicated by significantly SECTION 3 - TRANSFORMER TESTING lower voltage readings, replace the transformer with PROCEDURE the replacement service part specified on the parts list for the model charger being serviced. DANGER: HAZARD OF ELECTRIC SHOCK! FOLLOWING TESTS REQUIRE... -
Page 9: Scr Testing
measured voltage indicates Locate the in-line bullet connectors on the brown transformer has failed, indicated by significantly leads (gate) of the SCRs and disconnect, see figure lower voltage readings, replace the transformer with the replacement service part specified on the parts list for the model of charger being serviced. -
Page 10: Charger Ac Circuit
The SCRs may be electrically tested for an open If the SCRs are good, the charger’s ammeter will condition by turning them on one at a time manually indicate current flow when each SCR gate lead is while the charger is energized. To do so, first touched by the positive (+) end of the battery. -
Page 11: Building Circuit Breaker
RESULT IF THE CHARGER IS USED WITH AN the charger operates properly on other circuits, have INCORRECT FUSE. a qualified electrician check the original circuit. If the charger causes other fuses or circuit breakers (in the building) to blow, the charger must be checked for a problem. -
Page 12: Factory Assistance
SECTION 8 – FACTORY ASSISTANCE Technical support is available from the factory Monday through Friday, 8am – 4:30pm CT. Contact may be made by the following methods: Mail: Lester Electrical 625 West ‘A’ Street Lincoln, NE 68522-1794 USA Attention: Service Department...