Delta M125HV - Page 83

Table 6-2B: Fault Codes (inverter fault) & Messages
Message Description Action
Bus Unbalance
(F30)
Inverter Vbus voltage
unbalance
Inverter Vbus voltage significant
unbalance
Restart inverter by DC switches
Bus Voltage High
(F31, F33, F35)
Voc of PV array is over
1500Vdc
Restart inverter by DC switches
Bus Voltage Low
(F32, F34)
AC Current High
(F36,F37,F38
F39,F40,F41)
Surge occurs during operation
Contact customer service for
technical support
Contact customer service for
technical support
AC CT Fault
(F42)
Phase R CT is defective
AC CT Fault
(F43)
Phase S CT is defective
AC CT Fault
(F44)
Phase T CT is defective
AC current over range
The zero crossing circuit defective
The inverter circuit defective
Restart the inverter by DC switches
AC Current High
(F45)
Contact customer service for
technical support
Contact customer service for
technical support
ZC Circuit Fault
(F50)
Contact customer service for
technical support
Inv Circuit Fault
(F51)
Contact customer service for
technical support
Thermal fuse detected
abnormal temperature
Thermal Fuse
Fault
(F55)
Contact customer service for
technical support
Arc circuit fail
1. Check If any damage of DC connector
and DC wire
2. Contact customer service for
technical support
Arc circuit fail
(F58)
Arc fault
Arc fault
(F59)
Contact customer service for
technical support
DC current over range Restart inverter by DC switches
The external communication
connection is disconnected
1. Check the connection between external
unit and COMM
2. Contact customer service for
technical support
DC Current High
(F60, F70)
Ext COMM. Fault
(F74)
Grid relay open
Contact customer service for
technical support
Contact customer service for
technical support
AC RLY Open
(F29)
83
Error Message and Trouble Shooting