Verifying The Installation; Powering On The System - Huawei Backup Box-B0 Quick Manual

SUN2000-(3KTL-12KTL)-M1
COM Port Pin Definitions
4

Verifying the Installation

No. Acceptance Criteria
1 The installation is correct and reliable.
2 Cables are routed properly as required by the customer.
3 Cable ties are secured evenly and no burr exists.
4 The PE cable is connected correctly, securely, and reliably.
5 The switch of the Backup Box and all the switches connected to it are OFF.
6 Cables are connected correctly and securely. Use a phase sequence meter to check
whether the cables on the grid side are connected correctly.
7 Unused terminals and ports are locked by watertight caps.
8 The installation space is proper, and the installation environment is clean and tidy.
5

Powering On the System

1. Use a multimeter to check whether the AC voltage in the power distribution box (PDB) is
within the allowed range and whether cables are correctly connected.
2. Turn on the PDB AC switch between the Backup Box and the power grid. (Ensure that the
load switch of the Backup Box is OFF.)
3. Check whether the cable connection of the grid AC terminals is correct.
4. (Optional) Remove the locking screw beside the DC switch on the inverter.
COM port (COM)
No. Label Definition
DIN1
8
Digital input
signal 1+
16 GND GND
11
Inverter AC
Note
Functions as the port for the
Backup Box to send feedback
signals.
Connects to the GND of DIN1.