6
33
Fault Type
Possible Causes
Solutions
Fault
Code
Operating Time
Over
User trial time is over
C o n t a c t t h e m a n u f a c t u r e r h e l p
END
Current
Detection
Circuit Fault
ItE
1. Loose contact of the control
board linker
2. Auxiliary power supply is
damaged
3. Hall sensor is damaged
4. Amplifying circuit is abnormal
1. Check the linker and plug it again
2. Contact the manufacturer for help
3. Contact the manufacturer for help
4. Contact the manufacturer for help
Grounding
Short Circuit
Fault 1
EtH1
1. Inverter output cable is
shorted to ground
2. Current detection circuit is
faulty
1. Check the output wiring
2.Contact the manufacturer for help
Grounding
Short Circuit
Fault 2
EtH2
Low Sunlight
Alert
AL-LU
1. Light is too weak
2. Solar panels are not sufficient
1. Wait for stronger sunlight
2. Check whether the solar panels are
sufficient
Tank Full
Alert
AL-tF
1. Light is too weak
2. Solar panels are not sufficient
1. Wait for stronger sunlight
2. Check whether the solar panels are
sufficient
Source Low
Alert
AL-SL
1. Water level is too low
2. Incorrect parameter setting or
wiring
1. The inverter will stop automatically
and restart after alert is cleared
2. Check the wiring and parameter
setting of terminal DI3
Load Low Alert
AL-LL
1. Water level is too low
2. Improper parameter setting
1. Check the water level
2. Adjust the dry running threshold
If the fault still cannot be eliminated according to the solutions above, please contact
the manufacturer for help.
WARNING
Please nd out the fault cause and eliminate it before reset.
If the inverter cannot be reset or the fault occurs again,
please do NOT reset again until nding out the cause,
otherwise repeated reset will damage the inverter.
6. MAINTENANCE
6.1 Routine Inspection and Maintenance
Due to ambient temperature, humidity, dust, vibration and aging of the inverter internal
components, some potential problems may arise during the operation.
In order to ensure a long-term and stable operation of the inverter, routine and yearly
inspection is necessary.
