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Solar charge controller Smart-MPPT Li series User Manual
9.LED indications and Faults & Alarms
9.1LED
Display
Explanation
9.2Faults & Alarms
Fast flash(0.1s/0.1s)
LED
Status
Function
Green
LED
Red
LED
On
Off
On
Fl as hi ng( 0. 5s /0. 5s )
Fas t flas h( 0. 1s /0. 1s )
Red
Green
Both off
Both on 1s
Battery connected,
Daytime detected
Battery connected,
night detected
No fault detected
Low voltage protection
Overcurrent or
short circuit protection
Over temperature
protection
Over voltage protection
No connection to battery
Start up Self test
MPPT Charging
Sl ow flas h( 1s /1s )
Slow flash(0.5s/2s)
Fault
Status
Reason
Remedy
Over
voltage
protection
Battery
can’t be
charged
Ove rcu rr ent,
sh ort cir cu it
protec ti on
Battery capacity
is low
Loads are
over current
or short circuit
High battery
voltage
>
(”CVT” + 0.2V)
PV panel fault
or reverse
connection
Load will be reconnected
when battery is recharged
Switch off all loads,
remove short circuit,
load will be reconnected
after 1 minute automatically
Green
LED
is on
Low
voltage
protection
Low v olt.
protection
Over temp .
protection
Controller temp.
is too high
Load reconnects
after temp. reduces
High
voltage
at
battery
terminal
Loads
are
not
powered
Check if other sources
overcharge the battery.
If not,controller is damaged.
Battery wires or
battery fuse
damaged,
battery has high
resistance .
Check battery wires,
fuse and battery.
Battery is
empty
after a
short time
Battery has low
capacity
Change battery
Check panels and
connection wires
Flash(0.5s on/0.5s off )
Charging, reach the
target voltage
Red LED
Green LED
R
eceiver
Emitting
10.Safety Features
Short circuit
Over current
Over voltage
Over temp.
Reverse
polarity
Solar terminal
Protected *1
Protected
Protected
Max.60V *3
Battery terminal
Protected
Protected *2
Max. 40V *4
Load terminal
Protected *1
Switches off
Switches off
with delay
The controller cuts off the load if the
temperature reaches the set value.
Switches off
immediately
Reverse
Current
Under
voltage
*1.Controller can protect itself, but loads might be damaged.
*2.Battery must be protected by fuse, otherwise battery will
be damaged.
*3.The PV panel voltage should not exceed 60V for a long
time.
*4. Please refer to “11.Technical Data” to get the max
voltage of battery.
!
Warning: The combination of different error conditions
may cause damage to the controller.
Always remove the error before you continue connecting
the controller.
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