Maintenance
41
User Manual V1.0-2022-03-22
9.5 Routine Maintenance
Maintaining Item Maintaining Method Maintaining Period
System Clean
Check the heat sink, air intake, and air
outlet for foreign matter or dust.
Once 6-12 months
DC Switch
Turn the DC switch on and o ten
consecutive times to make sure that it is
working properly.
Once a year
Electrical Connection
Check whether the cables are securely
connected. Check whether the cables are
broken or whether there is any exposed
copper core.
Once 6-12 months
Sealing
Check whether all the terminals and ports
are properly sealed. Reseal the cable hole
if it is not sealed or too big.
Once a year
No. Fault Cause Solutions
30 BUS Overvoltage
1. The PV voltage
is too high.
2. The sampling
of the inverter
BUS voltage is
abnormal.
Disconnect the AC output switch and DC input
switch, then connect them 5 minutes later.
Contact the dealer or the after-sales service if
the problem persists.
31
PV Input
Overvoltage
The PV array
conguration is
not correct. Too
many PV panels are
connected in series
in the PV string.
Check the serial connection of the PV array.
Make sure that the open circuit voltage of the
PV string is not higher than the maximum
operating voltage of the inverter.
32
PV Continuous
Hardware
Overcurrent
1. The PV
conguration is
not proper.
2. The hardware is
damaged.
Disconnect the AC output switch and DC input
switch, then connect them 5 minutes later.
Contact the dealer or the after-sales service if
the problem persists.
33
PV Continuous
Software
Overcurrent
1. The PV
conguration is
not proper.
2. The hardware is
damaged.
Disconnect the AC output switch and DC input
switch, then connect them 5 minutes later.
Contact the dealer or the after-sales service if
the problem persists.
34
String1 PV String
Reversed
The PV string
is connected
reversely.
Check whether the PV1 and PV2 strings are
connected reversely.
35
String2 PV String
Reversed
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