6. Cables: Check if all cables are reliably connected. Check if the
connections are effective, while the insulations are undamaged.
7. Groundings: Check all groundings using multimeter and if all exposed
metal parts of the inverter are properly grounded.
8. DC Voltage: Check if the largest open-circuit voltage of PV arrays
complies with the permitted range.
9. DC Polarity: Check if the wires from DC voltage resource are connected
to terminals with correct polarity.
10. Grounding Resistance: Check if the grounding resistance of PV strings
1MOhm using a multimeter.
After all installation and checks, close the AC circuit-breaker, then the
DC switch. The inverter will start to operate when DC input voltage and
grid conditions meet the requirements of inverter startup.
7.2 Inverter LED Indicators
When the inverter operates, LED symbols on display have the following
meanings:
16
7.3 Display and Control Logics
When inverter starts up and operates, there is a control button beside LCD
Display of the inverter. Please follow the logics listed below.
V.2
17
V.2