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Alpha ESS Co., Ltd.
Page 58 of 69
Your Smart Energy
10.2 Troubleshooting
10.2.1
Inverter Error Troubleshooting
Inverter LED Signals
LED
Status
Description
Normal
Normally on: normal operation
Single flicker: system standby or self-checking
Extinguishing: out-of-order
Fault
Extinguishing: fault-free
Normally on: out-of-order
COM
Normally on: normal network connection
Flicker: connecting to the server
Extinguishing: un-connected network
Description
Solution
Warning
Grid AC over voltage
1. If these warnings occur occasionally, it is a short-time fault
of the grid. The inverter will resume work after the grid is nor-
mal. No action is required.
2. If these warnings occur frequently but can be automatically
cleared, contact the local power operator for permission and
modify the grid protection parameters of the inverter.
3. If the recovery fails for a long time, please confirm
：
1) Whether the AC circuit breaker is switched off.
2) Whether the AC terminal is in good contact
3) Whether the grid is disconnected.
Grid AC under voltage
Grid AC absent
Grid AC over fre-
quency
Grid AC under fre-
quency
Grid abnormal
Inverter over tempera-
ture
1. If the warning occurs occasionally and the inverter can re-
sume work automatically. No action is required.
2. If this warning occurs frequently or continuously, check
whether the installation site has direct sunlight, good ventila-
tion, and high ambient temperature. If there is no direct sun-
light and there is good ventilation and heat dissipation,
please contact AlphaESS after-sales team.
Ground disconnection
alarm
Please check whether the grounding cable is connected. If
yes, check whether the cables are connected properly.
Zero firewire reverse
alarm
Please check whether the live line and neutral line are in-
versely connected.
NTC fail
Please check whether the cable connection to the NTC termi-
nal is loose.
Battery voltage very
high
If the warning occurs at the first installation, please check
whether the battery voltage is within the allowable range.
If this warning occurs during operation, check whether the
battery cable is loose and whether the BMS communication
is abnormal.
