DAYLIFF SUNVERTER 3 Installation & Operating Manual page 34

PROBLEM
Inverter does not
work when powered
on
The pump does
not run
Flow not sufficient
High operation
frequency but no
water yield
POSSIBLE CAUSE
Indicator light is off
Indicator light is on
The motor overload has tripped out
The inverter is defective
The dry running protection has cut out
the pump due to low water level
The pump's submersible drop cable is
defective
Solar array has not met design
requirements
Operation voltage insufficient
The draw down is larger than anticipated
Wrong direction of rotation
The valves in the discharge pipes are
partly closed or blocked
The non-return valve of the pump is
partly blocked
The pump is defective
Leakage in the pipework
Wires loosely connected
Installation head is more than pump
maximum lift
Pump is running in reverse
Dirt in the pump
SOLUTION
Check DC input wires connection
Cut of inverter input wires and check if
input voltage is abnormal
Reset the motor starter overload. If it trips
again, check the voltage else call service
technician
Check the inverter
Check the water level. If it is in order
check the water level electrodes/ level
switch
Repair/replace the cable
Resize and increase the solar array
Select an appropriate pump
Increase the installation depth of the
pump, throttle the pump or replace it by
a smaller model to obtain a smaller
capacity
Change direction of rotation
Check and clean or replace the valves
and discharge pipe
Pull out the pump. Check and clean or
replace the pump if necessary
Repair or replace the pump
Check and repair the pipe work
Tighten wires and check if firmly
connected
Select an appropriate pump
Check connections
Clean the pump
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