Chapter 8 Troubleshooting and Countermeasures
-83-
Control power supply
If the input voltage is within the range
as specified by the specifications
Adjust the voltage to the range as
specified by the specifications
Ask for technical support
˪R
Fig.8-8 Control power supply fault˄ERR08˅
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
buffer resistor are normal
Replace the broken rectifier
bridge or buffer resistor
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
Fig.8-9 Under Voltage Fault˄ERR09˅
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