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User Manual V1.1-2022-07-20 09 Maintenance
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
Fan
Check the fan for proper working status,
low noise, and intact appearance.
Once a year
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
THDi Test
For Australia requirements, in the THDi
test, there should add Zref between
inverter and mains.
Zref:
Zmax or Zref (phase current>16A)
Zref: L: 0.24 Ω + j0.15 Ω; N: 0.16 Ω + j0.10
Ω (phase current>16A, <21.7A)
Zref: L: 0.15 Ω + j0.15 Ω; N: 0.1 Ω + j0.1 Ω
(phase current>21.7A, <75A)
Zref: ≥5% Un/Irated+j5% Un/Irated (phase
current>75A)
As needed
DANGER
Power o the inverter before operations and maintenance. Otherwise, the inverter may be
damaged or electric shocks may occur.
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