Huawei SUN2000 MB0 Series User Manual

● Connect the possible faulty optimizer to the PV string.
● Set DC SWITCH to ON. If the inverter status is Shutdown: Command, choose
Maintenance > Inverter ON/OFF, and send a startup command. View alarm
information.
– If no Low insulation resistance alarm is reported 1 minute after the DC
side is powered on, the fault is on the possible faulty PV module.
– If the Low insulation resistance alarm is reported 1 minute after the DC
side is powered on, the fault is on the possible faulty optimizer.
● Log in to the app, choose Maintenance > Inverter ON/OFF on the home
screen, and send a shutdown command. Set DC SWITCH to OFF, replace the
faulty component, and complete troubleshooting the insulation resistance
fault. Go to Step 2 and check rest of the PV strings one by one. Then, go to
Step 8.
Step 8 Set DC SWITCH to ON. If the inverter status is Shutdown: Command, choose
Maintenance > Inverter ON/OFF, and send a startup command.
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SUN2000-(12K-25K)-MB0 Series
User Manual D Locating Insulation Resistance Faults
Issue 01 (2023-04-30) Copyright © Huawei Digital Power Technologies Co., Ltd. 130

Huawei SUN2000 MB0 Series Specifications

General

Type	String Inverter
Max Input Voltage	1100 V
MPPT Voltage Range	200 V - 1000 V
Number of MPPTs	2
Max Input Current per MPPT	26 A
Rated Output Frequency	50 Hz / 60 Hz
Max Efficiency	98.6%
Operating Temperature Range	-25°C to +60°C
Protection Degree	IP65
Cooling	Natural Convection
Power Factor Adjustment Range	0.8 leading to 0.8 lagging
Cooling Method	Natural Convection
Protection Level	IP65
Model	SUN2000
Rated Output Voltage	230 V / 400 V
Humidity	0% - 100%
Communication	RS485