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Troubleshooting and Maintenance
8.
Troubleshooting and Maintenance
Before maintaining and commissioning inverter and its peripheral distribution unit,
switch off all the charged terminals of the inverter and wait at least 10 minutes after
WARNING
the inverter is powered off,otherwise there will be a high voltage shock..
Wrong maintenance will result in personnel injury or equipment damage!
Before performing any maintenance operations, you must follow these steps:
First, disconnect the AC circuit breaker on the grid side, and then disconnect
the DC switch.
DANGER
Wait at least 10 minutes after the inverter is powered off,otherwise there will be a
high voltage shock.
Use testing equipment to make sure there no voltage or current.
Comply with ESD protection specifications and power distribution ESD bracelets.
Avoid unnecessary contact with the circuit board.
NOTICE
Touching printed circuit boards or other electrostatic sensitive components may
cause damage during the process.
8.1
Troubleshooting
If the inverter is break down, the LED indicator will turn to red.
Alarm
Measures Recommended
Information
1.If the alarm occurs accidentally, possibly the power grid is abnormal accidentally. No
extra action is needed.
2.If the alarm occurs repeatedly, contact the local power station. After receiving approval
of the local power bureau, revise the electrical protection parameters setting on the
inverter through APP.
A0-Grid over
3.If the alarm persists for a long time,please confirm:
voltage
1) The AC circuit breaker does not jump frequently (the instantaneous high pressure);
2) If the line of communication is followed by the user manual, the cable impedance will
cause the power grid to rise;
3) The three-phase machine measures whether the voltage between the zero line and the
ground line exceeds 30V; More than the wiring of the grid;
If there is no problem, Pls.contact the customer service center.
1.If the alarm occurs accidentally, possibly the power grid is abnormal accidentally. No
extra action is needed.
2.If the alarm occurs repeatedly, contact the local power station. After receiving approval
of the local power bureau, revise the electrical protection parameters setting on the
inverter through APP.
A1-Grid under
3.If the alarm persists for a long time,please confirm:
voltage
1) AC circuit breaker is disconnect ro not;
2) Whether the AC circuit breaker is damaged (whether the voltage in the closed state is
consistent with the voltage of the outlet);
3) The AC terminals are in good contact.
If the actual measuring voltage is within the specification range, please contact the
customer service report repair.
32
Three phase Grid-tied PV String Inverter User Manual
Three phase Grid-tied PV String Inverter User Manual
1.If the alarm occurs accidentally, possibly the power grid is abnormal accidentally. No
extra action is needed.
2. If the alarm occurs repeatedly, contact the local power station. After receiving
approval of the local power bureau, revise the electrical protection parameters setting on
the inverter through APP.
3.If the alarm persists for a long time,please confirm:
A2-Grid absent
1) AC circuit breaker is disconnect ro not;
2) Whether the AC circuit breaker is damaged (whether the voltage in the closed state is
consistent with the voltage of the outlet);
3) The AC terminals are in good contact;
4) Whether the power supply line failure.
If exclude all possibility ,please contact the customer service report repair.
1.If the alarm occurs accidentally, possibly the power grid is abnormal accidentally. No
extra action is needed.
A3-Grid over
2.If the alarm occurs repeatedly, contact the local power station. After receiving approval
frequency
of the local power bureau, revise the electrical protection parameters setting on the
inverter through APP.
1.If the alarm occurs accidentally, possibly the power grid is abnormal accidentally. No
extra action is needed.
A4-Grid under
2.If the alarm occurs repeatedly, contact the local power station. After receiving approval
frequency
of the local power bureau, revise the electrical protection parameters setting on the
inverter through APP.
3.If the alarm persists for a long time,Pls.contact the customer service center.
1.If the alarm occurs accidentally, possibly the power grid is abnormal accidentally. No
extra action is needed.
2.If the alarm occurs repeatedly,please confirm:
1) The three-phase voltage is measured, and confirm the three-phase voltage imbalance is
A6-Grid abnormal
more than 30%, Please improve the power supply condition of the power grid company.
（Only for three-
2) The three-phase AC circuit breaker is damaged or not (whether the voltage of the inlet
phase inverter）
line and the outlet of the outlet is consistent).
3) The AC circuit breaker have zero line or not, and if the line is cut off, the short zero
line confirmation problem is repeated, if not again, replace 3Pole switch or the zero line
is short. If still, please contact customer service report repair.
Check whether the maximum voltage of a single string of input PV modules exceeds the
B0-PV over
MPPT voltage range. If the maximum voltage is higher than the standard voltage, modify
voltage
the number of PV module connection strings.
1.If the alarm occurs accidentally, the inverter can generate power, check the installation
environment is wet or not of the component and wire rope,and improve the installation
environment.
B1-PV insulation
2..If the alarm occurs repeatedly, the inverter can generate electricity occasionally, check
abnormal
whether the positive and negative polarity of the pv component is short circuit, and check
the component is damaged or the connection line is broken.
3.If the alarm continues, equipment cannot generate power, please contact customer
service report repair.
Troubleshooting and Maintenance
33
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