© Jan. 2024 38 0608ME All Maintenance Manual
ELECTRICAL SYSTEM
NOTICE
If Result 1 cannot be achieved even after several
attempts the battery may be malfunctioning.
6. Check the battery electrolyte level. Make sure the
electrolyte level is correct. Add distilled water as
needed.
7. Install the battery vent cover.
Adding Fluid
NOTICE
• For lead-acid batteries (requiring maintenance),
the electrolyte level should be checked after each
charging. If the level is low, add water in time.
• The water shall be added after charging. Adding
water before charging may cause acid overflow
during charging.
• For batteries equipped with an automatic water refill-
ing system, when the electrolyte is at the lowest level
with the battery fully charged (the white dot in the
battery observation opening is not at the top), add
water immediately. It is recommended to use an au-
tomatic water refilling device for refilling. Correct
steps for its application are as follows:
1. Open the bucket cover of the refilling device.
2. Add deionized water.
3. Put the cover back on and connect the refilling
plug.
4. Connect the quick connector between the refilling
device and the battery, and turn on the power
switch to start automatic water refilling.
5. After water refilling is completed, the automatic
water refilling system will automatically stop.
6. Turn off the power switch and disconnect the
water refilling plug to complete the refilling
process.
• If the battery is not equipped with an automatic refill-
ing system, check the electrolyte level after charging.
If the level is lower than the allowed minimum level
(the white dot in the battery observation hole is not at
the top), add suitable distilled water or deionized
water to the standard level (1-2 cm above the mini-
mal level of the water filler plug). Wear gloves during
the process. Never add any acid solution.
Equalization
Equalization is the deliberate process of overcharging
the flooded/wet battery after it has been fully charged.
Equalize the battery only when its specific gravity is low
(less than 1.25) or its specific gravity exceeds the scope
(more than 0.030) after the battery is fully charged.
NOTICE
• Equalization can only be performed on flooded/
wet batteries. Do not balance other types of
batteries.
• To prevent battery damage, the battery must be
equalized after a storage period of up to three
months from the date of delivery.
1. Check the electrolyte level to ensure that it meets
the specified requirements.
2. Verify that all vent caps are properly secured to the
battery.
3. Set the charger to equalization mode.
4. Charge the battery in equalization mode. The bat-
tery will bleed air in the equalization process (form-
ing bubbles).
5. Remove the vent cap every hour to measure the
specific gravity of all battery cells, stop charging in
equalization mode if the specific gravity doesn’t in-
crease any further.
Storage
• Fully charge the battery before placing the machine
into storage.
• The battery should be stored in a cool and dry envi-
ronment (temperature 10℃-25℃/50–77℉, RH＜
90 %). Charge the battery every 3 months using the
charger provided by the manufacturer.
• Switch off the main power switch and the emergency
stop button to eliminate potential hazards associated
with electrical leakage.
• The battery will self-discharge gradually during stor-
age. Monitor the specific gravity or the voltage every
4～6 weeks. The equivalent values of the state of
charge, specific gravity and open-circuit voltage are
shown in the following table.
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