Alpha ESS PWG2-100K, User Manual, Page: 47 / 49

Appendixes 35
Appendixes
Appendix 1: Fault information of Bi-directional Hybrid Storage Inverter
Table 9-1 presents the visible fault types of Bi-directional Hybrid Storage Inverter. From this table, users can simply
and quickly identify the system faults from the fault types displayed on touch screen. In multiple module parallel
system, the warning information interface will indicate the number of fault slaves and fault type.
Table 9-1 Fault information
Fault type Description
Overvoltage of power grid
The voltage of power grid is higher than the set upper limit. After faults are recovered,
restart the Bi-directional Hybrid Storage Inverter.
Overvoltage of power grid
The voltage of power grid is lower than the set lower limit. After faults are
recovered, restart the
Bi-directional Hybrid Storage Inverter
.
Inverted sequence of power grid
The phase sequence of AC power grid is inverse.
Abnormality of power grid
frequency
Power grid frequency exceeds the set scope. After faults are recovered, restart
the
Bi-directional Hybrid Storage Inverter
.
Islanding of Bi-directional Hybrid
Storage Inverter
There is islanding in
Bi-directional Hybrid Storage Inverter
.
Overvoltage of DC input Overvoltage of DC input is higher than the upper limit. After faults are
recovered, restart the
Bi-directional Hybrid Storage Inverter
.
Low DC voltage
Overvoltage of DC input is lower than the lower limit. After faults are
recovered, restart the
Bi-directional Hybrid Storage Inverter
.
Abnormality of BUS bar voltage
DC BUS bar voltage is too high or low, which results in system shutdown. After
faults are recovered, restart the
Bi-directional Hybrid Storage Inverter
.
Abnormality of balanced circuit
BUS bar voltage is imbalanced
(internal fault information)
Soft start fault Soft start fault
(internal fault information)
Emergency shutdown
EPO action, emergency shutdown
Over-temperature of inverter
The temperature of inverter radiator is too high.
Fan fault At least one cooling fan has faults.
Monitoring parameter setting
fault
Monitoring parameter setting is incorrect. Please modify the setting.
Appendix 2: Quality assurance and after-sales service
1) Quality assurance
If there are fault products during warranty period, users should provide relevant certificates for purchased products.
Shenzhen Sinexcel Electric Co., Ltd. (“Sinexcel”) will provide free maintenance or replace it with a new product.
2) Disposal of claim products