Appendixes; Appendix 1: Fault Information Of Bi-Directional Hybrid Storage Inverter; Appendix 2: Quality Assurance And After-Sales Service - Alpha ESS PWG2-50K User Manual

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.
Fault type
Overvoltage of power grid
Overvoltage of power grid
Inverted sequence of power grid
Abnormality of power
frequency
Islanding of Bi-directional Hybrid
Storage Inverter
Overvoltage of DC input
Low DC voltage
Abnormality of BUS bar voltage
Abnormality of balanced circuit
Soft start fault
Emergency shutdown
Over-temperature of inverter
Fan fault
Monitoring parameter setting
fault

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

Appendixes

Table 9-1 Fault information
The voltage of power grid is higher than the set upper limit. After faults are recovered,
restart the Bi-directional Hybrid Storage Inverter.
The voltage of power grid is lower than the set lower limit. After faults are
recovered, restart the
The phase sequence of AC power grid is inverse.
Power grid frequency exceeds the set scope. After faults are recovered, restart
grid
the
Bi-directional Hybrid Storage Inverter
There is islanding in
Overvoltage of DC input is higher than the upper limit. After faults are
recovered, restart the
Overvoltage of DC input is lower than the lower limit. After faults are
recovered, restart the
DC BUS bar voltage is too high or low, which results in system shutdown. After
faults are recovered, restart the
BUS bar voltage is imbalanced
(internal fault information)
Soft start fault
EPO action, emergency shutdown
The temperature of inverter radiator is too high.
At least one cooling fan has faults.
Monitoring parameter setting is incorrect. Please modify the setting.
Description
Bi-directional Hybrid Storage Inverter
.
Bi-directional Hybrid Storage Inverter
Bi-directional Hybrid Storage Inverter
Bi-directional Hybrid Storage Inverter
Bi-directional Hybrid Storage Inverter
(internal fault information)
Appendixes 35
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