Control power supply
If the input voltage is within the ra nge
a s s pe cified by the s pe cifica tions
Adjus t the voltage to the ra nge a s
spe cified by the s pe cifica tions
As k for te chnica l s upport
ï¼®o
Under voltage fault
If there is transient power failure
Reset the fault
Detect if the voltage at the input end of
the inverter is within the range as
specified by the specifications
Adjust the voltage to normal range
Measure if the DC bus voltage is normal
Check if the rectifier bridge and
buffe r re s is tor a re norma l
Replace the broken rectifier
bridge or buffer re s is tor
Check if the drive board is normal
Replace the drive board
Check if the main control board is normal
Replace the control board
No
No
No
No
No
Yes
Yes
Yes
Yes
Yes
No
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