Delta M70A-262 Operation And Installation Manual page 75

Table 6-2B: Fault Codes (inverter fault) & Messages
Message
Red COMM
The internal communication
Fault
connection is disconnected
(F22)
DSP COMM
The communication
Fault
connection is disconnected
(F23)
Ground Cur.
Insulation problem of PV array
High
to ground
(F24)
1. Power line is disconnected
Iac Unbalance
(F26) 2. Current feedback circuit is
RCMU Fault
RCMU circuit is disconnected
(F27)
AC RLY Short
Grid relay short
(F28)
AC RLY Open
Grid relay open
(F29)
Bus Unbalance Voltage unbalance of
(F30) DC link
Bus Voltage High Voc of PV array is over
(F31) 1000Vdc
AC Current High
Surge occurs during operation
(F36)
AC CT Fault
Phase R CT is defective
(F42)
AC CT Fault
Phase S CT is defective
(F43)
AC CT Fault
Phase T CT is defective
(F44)
AC Current High
AC current over range
(F45)
Description
inside the inverter
defective
Error Message and Trouble Shooting
Contact customer service for
technical support
Check the connection interface RS-485
1. Check the insulation of Solar inputs
2. Check the capacitance (+ <-> GND &
- <-> GND), must < 10uF. Install
external transformer if necessary
Check the connection in AC terminal
Contact customer service for
technical support
Check the connection and Grid voltage
in AC terminal
Contact customer service for
technical support
Restart inverter by DC switches
Restart inverter by DC switches
Contact customer service for
technical support
Contact customer service for
technical support
Contact customer service for
technical support
Contact customer service for
technical support
Restart the inverter by DC switches
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