5.3 Fault Detection
YASKAWA ELECTRIC
TOEP C710656 10B YASKAWA Power Regenerative Unit - R1000 Instruction Manual
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Digital Operator
Display
Fault Name
Details
PF2
Input Power Supply
Fault
Abnormal oscillation in the main circuit DC bus continued. (Applies when L8-65 is set to 1 or 2.)
Cause
Possible Solution
The fluctuation in the voltage of the input
power supply is too large.
Investigate and correct the cause and reset the fault.
Refer to
Diagnosing and Resetting Faults on page 103
A phase loss occurred in the input power
supply.
The capacity of the power supply is too small.
The wiring is too long.
The phase imbalance is too large.
Digital Operator
Display
Fault Name
Details
PF3
Input Phase Loss
Detection
The voltage balance in the three-phase power supply has broken down. (Detected when L8-69 =
1.)
Cause
Possible Solution
The fluctuation in the voltage of the input
power supply is too large.
Investigate and correct the cause and reset the fault.
Refer to
Diagnosing and Resetting Faults on page 103
A phase loss occurred in the input power
supply.
The capacity of the power supply is too small.
The wiring is too long.
The phase imbalance is too large.
Digital Operator
Display
Fault Name
Details
SC
Input Short-circuit/
Main Transistor Failure
Short circuit or ground fault is detected.
Cause
Possible Solution
IGBT fault
• Check the wiring to the drive.
• Turn the power supply off and then on again to check operation.
If the problem continues, contact your Yaskawa representative or nearest Yaskawa sales office.
IGBT short circuit detection circuit fault.
Digital Operator
Display
Fault Name
Details
SRC
Phase Order Fault
The phase order detection direction for the input power supply changed after the power supply
was turned on.
Cause
Possible Solution
The power supply phase order changed during
operation.
Investigate and correct the cause and reset the fault.
Refer to
Diagnosing and Resetting Faults on page 103
A momentary power loss occurred.
An input power supply wiring terminal is loose.
The fluctuation in the voltage of the input
power supply is too large.
Digital Operator
Display
Fault Name
Details
Uv1
Main Circuit
Undervoltage
The following condition occurred in the regenerative unit when a Run Command was not being
input.
The main circuit DC voltage became equal to or lower than the set value of L2-05 (Undervoltage
Detection Level).
200 V Class: Approximately 190 V
400 V Class: Approximately 380 V
Cause
Possible Solution
A phase loss occurred in the input power
supply.
Check the wiring of the main circuit power supply for broken wires and wiring mistakes.
Correct the wiring.
An input power supply wiring terminal is loose.
Check the terminals for looseness.
Tighten the terminals to the tightening torque that is given in this manual. (See page
.)
TOEP_C710656_10B_1_0.book 91 ページ ２０１５年１月８日 木曜日 午後８時５５分
