Yaskawa D1000 Series Power Regenerative Converter User Manual
Page 119
5.3 Fault Detection
YASKAWA ELECTRIC TOEP C710656 07C YASKAWA Power Regenerative Converter - D1000 Instruction Manual
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Digital Operator
Display
Fault Name
Details
Uv2
Control Power Supply
Voltage Fault
Voltage is too low for the control converter input power.
Cause
Possible Solution
Internal circuitry is damaged.
• Cycle power to the converter. Check if the fault reoccurs.
• If the problem continues, replace either the control board or the entire converter. For
instructions on replacing the control board, contact Yaskawa or a Yaskawa representative.
Digital Operator
Display
Fault Name
Details
Uv3
Undervoltage 3
(Soft-Charge Bypass
Circuit Fault)
The soft-charge bypass circuit failed.
Cause
Possible Solution
The relay or contactor on the soft-charge
bypass circuit is damaged.
• Cycle power to the converter and see if the fault reoccurs.
• If the problem continues, replace either the control board or the entire converter. For
instructions on replacing the control board, contact Yaskawa or a Yaskawa representative.
• Check monitor U4-06 for the performance life of the soft-charge bypass.
• Replace either the control board or the entire converter if U4-06 exceeds 90%. For instructions
on replacing the control board, contact Yaskawa or a Yaskawa representative.
Digital Operator
Display
Fault Name
Details
Uv4
Gate Drive Board
Undervoltage
Voltage drop in the gate drive board circuit
Cause
Possible Solution
Not enough power is being supplied to the gate
drive board.
• Cycle power to the converter and see if the fault reoccurs. Refer to
for details.
• If the problem continues, replace either the gate drive board or the entire converter. For
instructions on replacing the gate drive board, contact Yaskawa or a Yaskawa representative.
Digital Operator
Display
Fault Name
Details
vrE
Resonance Detection A filter resonance fault was detected or there is a harmonic component on the power supply side.
Cause
Possible Solution
The power supply was turned off during
operation.
Stop the operation of the converter and turn off the power supply.
There is noise on the power supply line.
Investigate the source of the noise and implement countermeasures.
A phase was lost for an input terminal during
operation.
Check the wiring of the power supply system and remove the cause of the phase loss.
<1> If the fault occurs when starting the converter, CPF00 or CPF20 is displayed. If it occurs during operation, CPF01 or CPF21 is displayed.
<2> Detected in model 4A0630.
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