OPERATING THE MACHINE
GTZZ14EJ&16EJ Operation Manual 7-9 © Dec 2021
Charging
1. Check the battery level on the display of ground
control box. When the battery level is less than or
equal to 20%, an alarm will be triggered and the bat-
tery needs to be charged immediately. For the pur-
pose of not affecting the normal operation of the
machine, it is recommended to charge the battery
when the battery level is lower than 30%.
Alternatively, open the cover on the battery and
measure the density of the electrolyte. If the
density of the electrolyte is less than 1.13kg/l, it
means that the battery has been over-dis-
charged (the depth of discharge exceeds 80%)
and must be charged immediately. This should
be avoided, as frequent over-discharge will re-
duce the service life of the battery.
Note: Measure the temperature of the elec-
trolyte, if it is higher than 45°C, wait for the
battery to cool before continuing the follow-
ing steps.
2. Completely power off the machine.
3. Connect the plug between the battery and the
charger cable. If the machine is equipped with an
automatic water refilling system, ensure that the re-
filling pipe is connected.
4. Connect the battery charger to a grounded AC cir-
cuit. When the battery is fully charged, the corre-
sponding indicator light will be on.
5. After charging is complete, disconnect the cable
plug from the battery to the charger.
Adding water
NOTICE
• The electrolyte level should be checked after
each charging, and if the level is found to be low,
add water in time.
• The water shall be added after charging. Adding
water before charging may cause acid overflow
during charging.
1. For batteries equipped with an automatic water re-
filling system, when the electrolyte is at the lowest
level with the battery fully charged (the white dot of
the battery observation hole is not at the top), add
water immediately. It is recommended to use an au-
tomatic water refilling machine for refilling, with the
operation steps as follows:
1) Open the bucket cover of the water refilling
machine.
2) Add deionized water.
3) Put back the bucket cover and connect the
water refilling plug.
4) Connect the quick connector between the water
refilling machine 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 water refilling.
2. If the battery is not equipped with an automatic
water refilling system, check the electrolyte level
after charging. If the level is lower than the allow-
able height (the white dot of the battery observation
hole is not at the top), wear gloves to add conform-
ing distilled water or deionized water to the standard
level (1-2cm above the minimal level of the water
filler plug). Never add any acid solution.
CHEMICAL BURN HAZARD
• Avoid battery acid escaping out
or contact with unprotected skin,
and if does, wash the skin with a
large amount of clear water and
seek medical assistance
immediately.
• If excessive distilled water is
added, suck out the excessive
distilled water until normal level
is reached. If excessive distilled
water is added and the electro-
lyte overflows, use water mixed
with bicarbonate (baking soda)
to neutralize the acid, and blot
up the liquid with a suction pipe.
Charging the maintenance-free battery
1. Check the battery level on the display of ground
control box. When the battery level is less than or
equal to 20%, an alarm will be triggered and the bat-
tery needs to be charged immediately. For the pur-
pose of not affecting the normal operation of the
machine, it is recommended to charge the battery
when the battery level is lower than 30%.
2. Completely power off the machine.
3. Connect the charger to a grounded AC circuit. The
indicator light will be on after the battery is fully
charged.
4. After charging, disconnect the cable plug from the
battery to the charger.
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