User Manual
21
For details, please refer to table as below:
LED
Status
Detailed Message
Green
Normal
TRB inverters is working normally.
Yellow
Communication state
TRB inverters is communicating with other devices.
Burning software/
Software upgrade
The firmware is upgraded.
Red
GFCI Failure
The GFCI detection circuit is abnormal.
AC HCT Failure
The AC output sensor is abnormal.
Consistent Fault
：
DC inj. differs for M-S
Different measurements between Master and Slave for DC
output current.
Consistent Fault
：
Ground I differs for M-S
Different measurements between Master and Slave for GFCI.
High DC Bus
DC Bus voltage is too High.
Utility Loss
No grid voltage detected.
Ground I Fault
GFCI malfunction.
Over Temperature in
Inverter
Internal temperature of inverter is high.
PV Over Voltage
PV input voltage surpasses the tolerable maximum value.
Fan Lock
Fan malfunction.
AC Voltage Out of Range
The measured AC voltage is out of tolerable range.
Isolation Fault
Isolation resistance of PV to earth is too low.
DC Injection High
The DC injection to grid is too high.
Consistent Fault
Different measurements between Master and Slave.
Consistent Fault
：
Fac differs for M-S
Different measurements between Master and Slave for grid
frequency.
Consistent Fault
：
Vac differs for M-S
Different measurements between Master and Slave for grid
voltage.
AC Relay-Check Fail
AC relay malfunction.
M-S Version Unmatched
Different CPU software version.
Fac Failure
：
Fac Out of Range
The master frequency is out of tolerable range.
EEPROM R/W Fail
EEPROM reading or writing error.
SPI Failure
：
Communication Fails
between M-S
Communication between microcontrollers fails.
5.3. LCD Display
The LCD display shows parameters of inverters which can be set through function
