Delta M70A

9 Error events and troubleshooting
Faults
Installation and Operation Manual for Solar Power Inverter M70A EU V1.1 EN 2020-02-20
102
Fault num-
ber
Message Possible causes Suggestions for resolution
F36, F37,
F38, F39,
F40, F41
AC Current High
Overvoltage during operation. Contact Delta Customer Service.
Internal error. Contact Delta Customer Service.
F42
HW CT A Fail
Internal error. Contact Delta Customer Service.
F43
HW CT B Fail
Internal error. Contact Delta Customer Service.
F44
HW CT C Fail
Internal error. Contact Delta Customer Service.
F45
HW AC OCR
Large grid harmonics. Check the grid waveform. The grid connection
of the inverter must be kept away from non-
linear loads; if necessary, move it further away.
Internal error. Contact Delta Customer Service.
F50
HW ZC Fail
Internal error. Contact Delta Customer Service.
F60, F61,
F70, F71
DC Current High
Internal error. Contact Delta Customer Service.