YASKAWA CIMR-DC4A0040AAA Technical Manual page 116

5.4 Alarm Detection
Digital Operator
Minor Fault Name
Display
oL2 Converter Overload
Cause
Load is too heavy.
The converter does not operate.
Digital Operator
Minor Fault Name
Display
ov
DC Bus Overvoltage
Cause
Electrical noise interference causes the
converter to operate incorrectly.
There was a regenerative load while the
converter is stopped.
The power supply voltage is too high.
There is a regenerative load while the converter
is stopped.
The wiring of the power supply voltage
detection circuits (
r1/ 11, 1/ 21, t1/ 31
the wiring of the main circuit terminals (R/L1,
S/L2, and T/L3) is not correct.
Digital Operator
Minor Fault Name
Display
PAUv
Cause
The power supply voltage is low.
A phase loss occurred in the input power
supply.
Voltage detection failed.
Digital Operator
Minor Fault Name
Display
Input Phase Loss
PF3
Cause
The fluctuation in the voltage of the input
power supply is too large.
A phase loss occurred in the input power
supply.
The interphase voltage balance is bad.
116
The thermal sensor of the converter triggered the converter overload protection.
Reduce the load.
Start converter operation first, and then start converter operation.
The DC bus voltage exceeded the trip point.
• 200 V Class: Approximately 410 V
• 400 V Class: Approximately 820 V
• Review possible solutions for handling noise interference.
• Review section on handling noise interference and check control circuit lines, main circuit lines
and ground wiring.
• If the magnetic contactor is identified as a source of noise, install a surge protector to the MC
coil.
Set number of fault restarts (L5-01) to a value other than 0.
Operate the converter.
Lower the voltage so that it is within the power supply specifications of the converter.
Operate the converter.
Check the wiring.
) and
Correct the wiring.
The input power supply voltage became equal to or lower than the Input Power
Supply Undervoltage Detection Level.
Power Supply 200 V Class: Approximately 150 Vac
Undervoltage 400 V Class: Approximately 300 Vac
Pre-Alarm The converter enters the baseblock state during pre-alarm. When the input supply
voltage is restored during the pre-alarm, the converter will release the base block
and continue to operate.
Increase the power supply voltage.
Check the input power supply for phase loss or an imbalance in the interphase voltages.
Investigate and correct the cause and reset the fault.
Check r1/ 11,
Abnormal oscillation continued in the input power supply voltage. (Detected
Detection when L8-69 = 1.)
Investigate the cause and implement countermeasures.
Refer to Diagnosing and Resetting Faults on page 121
YASKAWA ELECTRIC SIEP C710656 06F YASKAWA Power Regenerative Converter - D1000 Technical Manual
Detail
Possible Solutions
Detail
Possible Solutions
Detail
Possible Solutions
1/ 21, t1/ 31 to see if they are wired correctly.
Detail
Possible Solutions
Output
(H2-=10)
Output
(H2-=10)
Output
(H2-=10)
Output
(H2-=10)
for details.
Alarm
YES
Alarm
YES
Alarm
YES
Alarm
YES