System Maintenance; System Power-Off; Routine Maintenance - Pytes HV48100 User Manual

7 System Maintenance

DANGER
Wear personal protective equipment and use dedicated insulated tools to avoid electric
shocks or short circuits.
WARNING
Do not maintain batteries with power on. To power off the batteries before performing opera-
tions such as checking and tightening screw torques, explain the risks to the customer, obtain
the customer's written consent, and take effective preventive measures.
After batteries are discharged, charge them in time to avoid damage due to overdischarge.
Before moving or reconnecting the equipment, disconnect the mains and batteries and wait
for five minutes until the equipment powers off. Before maintaining the equipment, check that
no hazardous voltages remain in the DC bus or components to be maintained by using a
multimeter.
CAUTION
Do not connect two or more cables to the positive or negative power port of a battery in
parallel.
Stay away from the equipment when preparing cables to prevent cable scraps from entering
the equipment. Cable scraps may cause sparks and result in personal injury and equipment
damage.

7.1 System Power-Off

Step 1 Turn off the AC switch between the inverter and the power grid.
Step 2 Turn off the DC switch between battery and inverter.
Step 3 Turn off the DC switch between PV and inverter.
Step 4 Press SW button on BCU for 3 seconds. And wait for 20s for all battery shutdown.
Step 5 Turn off Power button on BCU.
Step 6 Switch off Isolation switch.
CAUTION
Do not turn off the External power switch during system running.
Before battery module replacement service, charge/discharge the replaced battery to same
voltage as the other modules in the system. Otherwise, it will take a long time for the system
to balance the module.

7.2 Routine Maintenance

System Cleanliness
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