Maintenance
86
ESS Inverter User Manual
D9
Internal communication
loss(E-M)
1.
Check whether the communication cables between BACKUP, electricity
meter and inverter are well connected and whether the wiring is correct
2.
Check whether the communication distance is within the specification
range
3.
Disconnect the external communication and restart the electricity
meter and inverter.
4.
If exclude the above, the alarm continues to occur, please contact the
customer service center.
DA
Internal communication
loss(M-D)
CU
Dcdc abnormal
1.
If the alarm occurs occasionally, the inverter can be automatically
recovered and no action is required.
2.
If the alarm occurs repeatedly, please check:
1)
Check whether the MC4 terminal on the PV side is securely connected.
2)
Check whether the voltage at the PV side is open circuit, ground to
ground, etc.
If exclude the above, the alarm continues to occur, please contact the
customer service center.
CP
BACKUP over dc-bias
voltage
1.
If the alarm occurs occasionally, the inverter can be automatically
recovered and no action is required.
2.
If the alarm occurs repeatedly, the inverter cannot work properly. Pls.
contact the customer service center.
DB
BACKUP short circuit
1.
Check whether the live line and null line of BACKUP output are
short-circuited.
2.
If it is confirmed that the output is not short-circuited or an alarm,
please contact customer service to report for repair. (After the
troubleshooting of alarm problems, BACKUP switch needs to be
manually turned on during normal use.)
DC
BACKUP over load
1.
Disconnect the EPS load and check whether the alarm is cleared
2.
If the load is disconnected and the alarm is generated, please contact
the customer service. (After the alarm is cleared, the BACKUP switch
needs to be manually turned on for normal use.)