Huawei SUN2000 Series Quick Manual page 15

Installing a DC input power cable
1. Use the positive and negative Staubli MC4 metal contacts and DC connectors supplied with the
solar inverter. Using incompatible positive and negative metal contacts and DC connectors may
result in serious consequences. The caused device damage is not covered under any warranty.
2. Before connecting the DC input power cables, label the cable polarities to ensure correct cable
connections. Otherwise, the solar inverter may be damaged.
3. Measure the voltage at the DC input end using a multimeter set to the DC position. If the voltage
is a negative value, the DC input polarity is incorrect. Correct the polarity. If the voltage is
greater than 1100 V, too many PV modules are configured to the same string. Remove some
PV modules.
4. If the DC input power cable is reversely connected and the DC switches are set to ON, do not
perform any operation on the switches or the positive and negative connectors. Otherwise, the
device may be damaged. The caused device damage is not covered under any warranty. Wait
until the solar irradiance weakens at night and the PV string current decreases below 0.5 A. Set
the three DC switches to OFF, and correct the connection of positive and negative connectors.
Positive metal contact
Negative metal contact
Click
PV-CZM-22100
Ensure that the cable
cannot be pulled out
after being crimped.
Use a multimeter
set to the DC
position to measure
the DC voltage.
14
Positive connector
Negative
Click
connector
Ensure that the
locking nut is
secured.
Open-end
spanner PV-MS