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fault data from M3 communication
cable
4. Restart Solar Plus
PV Voltage
High
PV Voltage High PV voltage higher than
580V for 100ms
Fault Check PV input voltage
PV
Short-circuit
PV input
short-circuited
PV voltage lower than
20V and PV current
higher than 5A
Fault 1. Check PV input
terminals
Battery
reversed
Battery terminals
reversed
PV voltage lower than
-10V for 100ms
Fault 1. Check battery
terminals
PV Access
Wrong
PV input and
discharge output
of Solar Plus
misconnected
PV voltage lower than
20V and BUCK voltage
higher than 50V and
cannot be dragged
down by 30s dummy
load on
Fault 1. Check PV input and
BUCK output
terminals
PV
Reversed
PV terminals
reversed
PV voltage check
signal is higher than
2.57V
Fault Check PV terminals
L-N
Reversed
AC terminals
reversed
The voltage between
N and Earth higher
than 100V for 100ms
Fault Check AC terminals
No AC AC voltage low AC voltage lower than
50V
Fault Check AC voltage
NTC Open NTC open NTC open Fault Check NTC terminals
Fuse Open Fuse Open Vdrop on fuse higher
than 10V for 200ms
Fault Check fuse
Battery
Open
Battery terminal
open (only for
lithium battery)
Battery voltage
sampled by SP is 10V
lower or higher than
BMS
Fault Check battery terminal
MPPT
Trouble
MPPT Trouble Exit discharge for no
MPPT five times
Fault Check state of PV
inverter
SS Timeout Soft start run out
of time
Bus or BUCK voltage
cannot get target
value after 2min soft
start
Fault Check voltage sample of
BUS or BUCK
BMS Error:
xxx
BMS failure and
either charge or
discharge is
allowed
BMS failure and either
charge or discharge is
allowed
Warning
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