Table 6-2A: Fault Codes (inverter fault) & Messages
Message Description Action
DC Injection
(F01, F02,
F03, F04)
Utility waveform is abnormal
Contact customer service for
technical support
Temperature
High
(F05)
One of inner ambient NTC and
inverter module NTCs is over
high temperature limit
Check the installation ambient and
environment
Temperature
Low
(F07)
One of inner ambient NTC and
inverter module NTCs is under
low temperature limit.
Check the installation ambient and
environment
Amb Temp
Fault
(F06)
The ambient NTC temperature
>105 ℃ or <-40 ℃
Contact customer service for
technical support
Inveter Temp
Fault
(F10)
The inverter NTC temperature
>125 ℃ or <-40 ℃
Contact customer service for
technical support
6.2 Fault Codes (Inverter Fault)
AC RLY Fault
(F13)
FW Unmatch
(F14)
Grid relay open
Firmware Incompatibility
Contact customer service for
technical support
Contact customer service for
technical support
AC Sensor
Fault
(F15)
DSP Iac or Vac sensor circuit
defective
1. Check the polarity of PV connection
(if the error code comes along with W08)
2. Contact customer service for
technical support
Contact customer service for
technical support
Red Vac sensor circuit
defective
AC Sensor
Fault (F18)
Red COMM
Fault (F22)
The internal communication
connection is disconnected
Contact customer service for
technical support
DSP COMM
Fault (F23)
The 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. Check the capacitance (+ <-> GND &
- <-> GND), must < 10uF. Install
external transformer if necessary
Iac Unbalance
(F26)
1. Power line is disconnected
inside the inverter
2. Current feedback circuit is
defective
Check the connection in AC terminal
RCMU Fault
(F27)
RCMU circuit is disconnected
Contact customer service for
technical support
Grid relay short
Check the connection and Grid voltage
in AC terminal
AC RLY Short
(F28)
82
Error Message and Trouble Shooting
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