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SECTION 3 – TROUBLESHOOTING & GENERAL MAINTENANCE
Caution: There are lethal voltages exposed when the charger is energized with the door open.
Always disconnect the AC service voltage to the charger before opening the door. The following
chart lists the most probable cause of a malfunction.
SYMPTOMS AND POSSIBLE CAUSES
3.1
. No charging current, the control has no display.
POSSIBLE CAUSE
A. Blown AC fuse.
B. No AC service voltage.
C. Incorrect AC voltage.
D. Defective control board.
E. Defective power supply.
3.2. No charging current, control has a display.
POSSIBLE CAUSE
A. Blown DC fuse.
B. Open battery cell.
C. Defective power module.
3.3. AC fuse blows.
POSSIBLE CAUSE
A. Incorrect fuse rating.
B. Incorrect AC voltage.
C. Loose connection in AC circuit.
D. Shorted power module.
3.4. DC fuse blows.
POSSIBLE CAUSE
A. Reversed battery connector.
B. Incorrect fuse rating.
C. Shorted power module.
3.5. Excessive water loss in battery.
POSSIBLE CAUSE
A. Charger amp-hour rating exceeds the battery amp-hour rating.
B. Battery has defective cells.
3.6. Low specific gravity at the end of the charge cycle.
POSSIBLE CAUSE
A. Battery was over-discharged.
B. Charger amp-hour rating is less than the battery AH rating.
C. Battery has defective cells.
D. Battery has been over-watered.
3.7. Charger does not turn off when the control terminates the charge cycle.
POSSIBLE CAUSE
A. Defective control.
3.8 General Maintenance
The charger requires a minimum of maintenance. Connections and terminals should be kept clean and
tight. The charger should be periodically cleaned with clean dry compressed air to prevent any excessive
dirt build up on components. Care should be taken not to bump or move any adjustments during cleaning.
Make sure that both the AC lines and the battery are disconnected before cleaning. The frequency of this
type of maintenance depends on the environment in which this unit is installed. If any cabinet sheet metal
panels are removed for cleaning, be certain they are properly reinstalled upon completion.
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