Maintenance; Power Off The Inverter - Goodwe DNS Series User Manual

Note：
Overvoltage Category Definition
Category Ⅰ
Applies to equipment connected to a circuit where measures have been taken to reduce transient overvoltage to a low level
Applies to equipment not permanently connected to the installation. Examples are appliances, portables tools and other
Category Ⅱ
plug- connected equipment
Applies to a fixed equipment downstream of and including the main distribution board. Examples are switchgear and other
Category Ⅲ
equipment in an industrial installation
Applies to equipment permanently connected at the origin of an installation (upstream of the main distribution board). Example
Category Ⅳ are electricity meters, primary over-current protection equipment and other equipment connected directly to outdoor open
lines
Moisture Location Category Definition
Moisture Parameters
3K3
Temperature Range
0~+40℃
Humidity Range
5%~85%
Environment Category Definition
Environment Condition Ambient Temperature
Outdoor -20~50℃
Indoor Unconditioned -20~50℃
0~40℃
Indoor Conditioned
Pollution Degree Definition
Pollution Degree Ⅰ No pollution or only dry, non-conductive pollution occurs.
Normally only non-conductive pollution occurs. Occasionally, however, a temporary conductivity caused
Pollution Degree Ⅱ
by condensation must be expected.
Conductive pollution occurs, or dry, non-conductive pollution occurs which becomes conductive
Pollution Degree Ⅲ
due to condensation which is expected.
Pollution Degree Ⅳ Persistent conductive pollution occurs, for example, the pollution caused by conductive dust, rain and snow.
31
Level
4K4H
4K2
-20~+55℃
-33~+40℃
4%~100%
15%~100%
Relative Humidity Applied to
4%~100%
PD3
5%~95% PD3
5%~85%
PD2

8 Maintenance

Regular maintenance ensures a long operating life and optimal efficiency of the entire PV plant.
Caution: Before maintenance, please disconnect the AC breaker, and disconnect DC breaker
then. Wait for 5 minutes until the residual voltage totally released.
9 Power off the inverter
When operating and maintaining the inverter, please power off the inverter. Operating the
equipment with power on may cause damage to the inverter or risk of electric shock.
After the inverter is powered off, there is a delay in the discharge of internal components.
Please wait until the equipment is completely discharged according to the required label time.
Step 1: (Optional) Issue a shutdown command to the inverter.
Step 2: Disconnect the AC switch between the inverter and the grid.
Step 3: Disconnect the DC switch of the inverter.
Step 4: (Optional) Disconnect the DC switch of the inverter and PV string paper.