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All work inside the A39DS charger should be performed by qualified personnel. La Marche
is not responsible for any damages caused by an unqualified technician.
Before working inside the A39DS, ensure the AC power is off at the main breaker box and the battery
has been removed from the charger’s DC output terminals, either by removing the battery cables or
exercising the battery disconnect. Verify that no voltage is present by using a voltmeter at all input and
output terminals.
5.1
Performing Routine Maintenance
Although minimal maintenance is required with La Marche chargers, routine checks and adjustments are
recommended to ensure optimum system performance.
NOTE:
When ordering replacement parts, provide model number and serial number.
Yearly
1.
Confirm air vents are open. Remove dust and debris from interior of unit.
2.
Verify all connections are tight.
3.
Perform a visual inspection on all internal components.
4.
Check front panel display for accuracy and LED operation.
5.
Measure the output ripple:
•
With the battery connected, measure ripple at the DC output terminals of the charger with a True-RMS
multimeter in the AC-Voltage setting. If the ripple reading is higher than the specified value in the table
below, the capacitors are recommended to be replaced.
Charger Model
AC Ripple Limit
30VDC
30mV RMS
60VDC
90VDC
100mV RMS
150VDC
Every 7 Years
1.
If the charger is consistently operated in higher temperature environments, all capacitors are recommended
to be replaced.
Every 10 Years
1.
Check magnetics, components and wiring for signs of excessive heat.
2.
Replace all capacitors if not done so at the 7-year interval.
5
Service
