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10 Daily Maintenance
the voltage and frequency of the utility grid are normal.
Inverter will check the feeding conditions immediately. If anything wrong during checking, inverter will switch to the
"Fault" mode.
3) Normal:
Conditions: All the checking results are normal.
Inverter will switch to "Normal" mode and feed power into utility grid.
The inverter may turn on and off continuously during the period of low or absent sunlight due to the shortage of
power generated by the PV modules. If such fault occurs frequently, please contact the maintenance personnel.
9.4 LED Indicators
No.
Operate states
1
2
3
9.5 Switch off
Never connect or disconnect the DC connectors under load.
DANGER
Procedure:
1) Turn off the AC main switch.
2) Turn off the DC switch.
3) Check the inverter operating status.
4) Wait until LED indicator has gone out, which indicates the inverter has been shut down.
10 Daily Maintenance
Risk of inverter damage or personal injury due to incorrect service!
Always keep in mind that the inverter is powered by dual sources: PV array and utility grid.
Before any service work, observe the following procedure.
1) Disconnect the inverter from the utility grid side first and then PV array.
DANGER
2) Wait at least 5 minutes after shut down the inverter, for inner capacitors to discharge completely.
3) Verify that no voltage and current existing with appropriate testing devices.
Keep non-related persons away!
A temporary warning sign or barrier must be posted to keep non-related persons away while
CAUTION
performing electrical connection and service work.
Risk of inverter damage if it is improperly serviced.
Use accessories and spare parts approved by the inverter manufacturer only. Never modify the
inverter or other components of the inverter. The loss of any or all warranty rights may follow if
NOTICE
otherwise.
Any malfunction that may impair the inverter safety operation must be repaired immediately before
the inverter is restarted.
Inverter contains no customer serviceable parts inside. Please contact local authorized personnel if
NOTICE
any service work is required.
Servicing of the device in accordance with the manual should never be undertaken in the absence of
proper tools, test equipment or the more recent revision of the manual with has been clearly and
thoroughly understood.
Information
Items
Check the temperature and dust of the inverter. Clean the inverter enclosure.
System
Check the humidity and dust of the environment.
clean
Meanwhile check whether the filter function of the air inlet is ok.
Wait
Normal
Error
Methods
LED Indicators
Green LED flicker
Green LED always on
Red LED always on
Flicker frequency
1s On，1s Off
/
/
Period
Six months to a year (it
depends on the dust contents
in air)
13 / 17
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