Solar Pump Inverter Chapter 5 Troubles Shooting
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A-LS
Weak light
Reason
Light is too weak to keep
Solution Wait for stronger sunshine
A-tF
Full water
A-LL
Water shortage
Reason
Water
sources are lacking of
water
Solution Wait for clearing alert
A-LL1
Water shortage
Reason
Water sources are lacking of
water
Solution Wait for clearing alert
5.2 Common faults and solutions
The drive may have following faults or malfunctions during operation, please refer to the
following solutions.
No display after power on:
Inspect whether the voltage of power supply is same as the inverter rated voltage or not
with multi-meter. If the power supply has problem, inspect and solve it. Inspect whether the
3 phase rectify bridge is in good condition or not. If the rectification bridge is burst out, ask
for support.
Check the CHARGE light. If the light is off, the fault is mainly in the rectify bridge or the
buffer resistor. If the light is on, the fault may be lies in the switching power supply. Please
ask for support. Power supply air switch trips off when power on:
Inspect whether the input power supply is grounded or short circuit. Please solve the
problem. Inspect whether the rectify bridge has been burnt or not. If it is damaged, ask for
support.
Motor doesn't move after inverter running:
Inspect if there is balanced three-phase output among U, V, W. If yes, then motor could be
damaged, or mechanically locked. Please solve it.
If the output is unbalanced or lost, the inverter drive board or the output module may be
damaged, ask for support.
If there is not output voltage, the drive board or the output module may be damaged. Ask
for support.
Inverter displays normally when power on, but breaker switch at the input side trips when
running: Please check whether inverter or motor has short circuit or wrongly connecting
earth.
If the breaker is occasionally switch off and the distance is too long between motor and
inverter, please consider to add AC output choke.
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