8 Communication
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7.6.3 Connecting PV array (DC input)
Danger
Ensure the DC switch and AC breaker both are disconnected from the inverter before connect the PV
arrays.
Never connect PV array positive or negative pole to the ground, it could cause serious damages to the
inverter.
Warning
Improper operation during the wiring process can cause fatal injury to the operator or unrecoverable
damage to the inverter.
Only qualified personnel can perform the wiring work.
8 Communication
8.1 Communication Mode
Two communication patterns for option, WiFi data logger, and RS485 (Built-in module).
8.2 WiFi Data Logger
More details for installation and operation methods please refer to the WiFi data logger user manual.
FIG. 8-1 Communication Port
8.3 RS485
Connect the communication port with a RS485-to-usb port converter via RS485 serial line, and then connect this
module to PC.
9 Commissioning Inverter
9.1 Checking Electrical
1) Check PE connections with multi-meter:
To make sure all the bare metal surfaces of the inverter are grounded.
2) Check DC voltage value:
Check if the DC voltage of the PV string exceeds the allowable range.
3) Check the polarities of the DC voltage:
To make sure the DC polarities are correct.
4) Check the ground insulation of PV array with multi-meter:
Ensure the impedance value of ground insulation is more than 1MOhm.
9.2 Checking Mechanical
1) Ensure the inverter is installed properly, fixed with a Wall-mounting bracket firmly, and the upper cover is installed
correctly.
2) Ensure the AC connectors are installed properly and fixed firmly.
3) Ensure the dust covers are sealed reliably which are used for the empty DC connectors.
4) Ensure all the cables are connected effectively, fixed firmly, and no visible damages to the insulation layers.
