Nilfisk-Advance 56397010 Service Manual

50 - FORM NO. 56043056 ConvertaMAX™ 20/26 / BA 550/650ELECTRICAL SYSTEMCHARGING THE BATTERIESCharge the machines battery pack each time the machine is used, or when the battery fuel gauge (12) is showing red flashing indicator lights. Note:The machine also uses a special low voltage cutout that inhibits the scrub system see in this manual section the description for the low voltagecutout feature.To Charge the Batteries...1 Push the connector from the charger into the machine Battery Charger Connector port (11) located behind the rear electrical control panel.2 Follow the instructions on the battery charger.3 Check the fluid level in all the battery cells after charging the batteries. Add distilled water, if necessary, to bring the fluid level up to the bottom of eachbattery cells filler tubes.WARNING!Do not fill the batteries before charging.Only charge batteries in a well-ventilated area.Do not smoke while servicing the batteries.CAUTION!Molded into the floor of battery compartment is a service drain for cleaning. To avoid damage to floor surfaces from a possible acidleak check that the drain hose is properly attached at both ends and is in good condition.BATTERY MAINTENANCEProper maintenance of electric vehicle batteries can greatly extend their life. Well-maintained batteries may last up to 3 years, but failure after1 year is common if maintenance has been poor.There are 3 simple rules for good battery maintenance:• Maintain Proper Electrolyte Level (Weekly) - Use distilled water in batteries whenever possible. If batteries are discharged, add just enough water tocover the plates in each cell. If batteries are fully charged, fill each cell to the bottom of the filler tube. Do not over-fill the batteries! Do not add acidto batteries!• Keep the Batteries Charged (Weekly) - Batteries should be charged each time that a machine is used for more than 1 hour. Machine operators shouldopen the battery compartment cover for charging, to avoid a concentrated build-up of hydrogen gas. Operators should follow the instructions provided withtheir specific battery charger, to determine how long the batteries should be charged. Even when a machine is stored, the batteries should be charged oncea month to prevent the batteries from “sulfating”. Almost all battery caps are vented, so there’s no need to loosen or remove them for charging.• Keep the Batteries Clean (Monthly) - Use a damp cloth to wipe dirt from the top of the batteries. Battery terminals must be clean and tight. If the topsof the batteries are wet after charging, the batteries have probably been over-filled or over-charged. Note: If there is acid on the batteries, wash the topsof the batteries with a solution of baking soda and water (2) tablespoons of baking soda to 1 quart of water.BATTERY TESTINGA battery problem is usually recognized by the machine operator, as a decrease in the machine’s running time. This condition is usually causedby one (or more) “dead cell” in the battery system- that is, one (or more) cell that is putting out less voltage than the other cells.Note: Always charge batteries before testing.There are 2 ways to find a dead cell:• Use a hydrometer to check the specific gravity (or “state of charge”) of the fluid in each cell. A dead cell is one that reads 50 points (or more) lower thanthe other cells.• Use a volt meter to check the voltage of each battery with the scrub drive motor running. The battery with the dead cell will read 1 or 2 volts lower thanthe other batteries in the system.If the batteries in the machine are more than 1 year old, it’s usually best to replace the whole set, rather than replacing just one battery.revised 7/02