Routine Maintenance; Troubleshooting - Huawei Backup Box-B0 Quick Manual

Parameter Settings
Off-grid mode If this parameter is enabled, the Backup Box switches to the
off-grid mode when the grid fails. This parameter can be set
only when the Backup Box is configured. If the Backup Box is
not configured, this parameter cannot be enabled.
Otherwise, an alarm is generated.
Backup power Sets the backup power SOC. In grid-tied mode, the battery
SOC does not discharge when it is discharged to the backup
power SOC. When the grid fails, the battery supplies power
to loads in off-grid mode until it reaches the end-of-
discharge capacity.
Grid-tied/Off- If this parameter is set to Automatic switching, the system
grid mode switches to the off-grid mode when the grid fails, and
switching switches to the grid-tied mode when the grid recovers.
If this parameter is set to Manual switching, you need to log
in to the app and connect the inverter to enable the off-grid
mode when the grid fails.
Verifying the Off-grid/Grid-tied Switching Function
1. Power on the Backup Box according to the power-on procedure, wait for the inverter to
connect to the power grid, and log in to the app to enable Off-grid mode.
2. Turn off the AC switch in the PDB between the Backup Box and the power grid, and check
whether the off-grid output is normal. The inverter indicators
orange. (If the AC switch between the inverter and the Backup Box is turned off, the off-grid
switching is not triggered and the inverter is in off-grid standby mode.)
3. Turn on the AC switch in the PDB between the Backup Box and the power grid. The inverter
indicators and
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Routine Maintenance

To ensure the long-term and proper running of the system, you are advised to perform routine
maintenance on the Backup Box periodically.
1. Check the system cleanliness, system running status, electrical connection, and grounding
reliability every half year.
2. Check whether the off-grid/grid-tied switching function is normal each quarter.
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Troubleshooting

1. Backup Box checking solution:
After arriving at the site, the personnel can check whether the Backup Box is damaged as
follows:
a. It is recommended that loads be disconnected before checking.
b. Use a multimeter to check the connectivity between the Backup Box terminals, as shown in
the following tables.
blink green slowly until the inverter is connected to the power grid.
13
Value
Enable

Disabled

(default)
[20%, 100%]
Default value: N/A
Automatic

switching
(default)
Manual switching

and are steady