Delta M100A 283

Table 6-2B: Fault Codes (inverter fault) & Messages
Message Description Action
DSP COMM Fault
(F23)
The internal communication
connection is disconnected
Check the connection interface RS-485
Ground Cur.
High
(F24)
Insulation problem of PV array
to ground
1. Check the insulation of Solar inputs
2. Contact customer service for
technical support
Iac Unbalance
(F26)
1. Power line is disconnected
2. Current feedback circuit is
defective
Check the connection in AC plug
RCMU Fault
(F27)
RCMU circuit is disconnected
Contact customer service for
technical support
Contact customer service for
technical support
Grid relay short
Grid relay open
Contact customer service for
technical support
AC RLY Short
(F28)
AC RLY Open
(F29)
Bus Unbalance
(F30)
Voltage unbalance of DC link Restart inverter by DC switch
Bus Voltage High
(F31, F32, F33
F34, F35)
High bus capacitor voltage
1.Restart inverter by DC switch
2.Check the solar array setting, and make
sure the Voc less than Max. Vdc of Inverter
(if the error code comes along with E30)
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
(F42,43,44)
Phase R / S / T CT is defective
AC current over range
The zero crossing circuit
is defective
The inverter circuit is defective
Restart the inverter by DC switches
AC Current High
(F45)
ZC Circuit Fault
(F50)
Contact customer service for
technical support
Inv Circuit Fault
(F51)
Contact customer service for
technical support
The boost circuit is defective
Boost Circuit Fault
(F52)
Contact customer service for
technical support
1. AFCI is not installed
2. AFCI self-test is fail
1. Check if there are any cable damaged
at DC side.
2. Replace DC cable and unlock the Arc
fault from DSS
3. Contact customer service for
technical support
Arc circuit fail
(F58)
The inverter detects arcing
occurs
Arc fault
(F59)
Check the AFCI detection circuit board for
making sure it is connected correctly
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Error Message and Trouble Shooting