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5. TROUBLE SHOOTING
5.1 Fault Code Description and Solution
The SV4 solar pumping inverter is equipped with comprehensive protection features. In
the event of a system fault, the inverter temporarily halts pump operation before
restarting. During protection events, the inverter screen will automatically switch to
display the warning code page.
When protection occurs, the inverter screen will automatically switch to the warning
code page.
5.2 Fault and Abnormal Code Description
Code Description
Possible Reason
Counter Measures
Warning
Code
Solar radiation is
too week
Too low PV input voltage
Too week PV input power
The light is too weak, the PV input
voltage is lower than the startup voltage,
wait until the voltage on solar array
reaches
the trigger voltage Pr.2 value is set too
high, modify the value according to
measured open circuit value of solar
array at site The light is weak, the
operating frequency is lower than the
weak light frequency, and it will restart
automatically after the weak light reset
delay time expires.
Over Voltage High input voltage
Inspect solar array voltage.
Under Voltage
Low input voltage
Weak sunlight intensity
Inspect solar array voltage.
Over Current
Too large pump load
Low solar array voltage
Long pump cable
Poor motor insulation
Change to low-power pump load
Inspect solar array voltage
Reduce the cable length between
inverter and motor
Inspect pump motor
Overload
Too large load
Reduce the highest operation frequency
Over current of
internal module
Output short circuit or
grounded
Module damage
Inspect the wiring
Refer to the nearest Dayliff dealer for
assistance
PV input over
current
Too high input in rush current
Device or circuit damaged
Wait for fault recovery (please consult
with manufacturer in advance when
using DC power supply such as battery)
Refer to the nearest Dayliff dealer for
assistance
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