YASKAWA CIMR-DC4A0040AAA Technical Manual page 117

Digital Operator
Minor Fault Name
Display
MEMOBUS/Modbus
SE
Test Mode Fault
Cause
A fault occurred during MEMOBUS/Modbus
Communications Test Mode.
Digital Operator
Minor Fault Name
Display
SrC Phase Order Fault
Cause
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
Minor Fault Name
Display
Uv Undervoltage
Cause
Phase loss in the converter input power.
Loose wiring in the converter input power
terminals.
There is a problem with the converter input
power voltage.
A power loss occurred.
Internal circuitry is worn.
The converter input power transformer is too
small and voltage drops when the power is
switched on.
Air inside the converter is too hot.
The CHARGE light is broken or disconnected.
Digital Operator
Minor Fault Name
Display
vrE Resonance Detection
Cause
There is noise on the power supply line.
YASKAWA ELECTRIC SIEP C710656 06F YASKAWA Power Regenerative Converter - D1000 Technical Manual
A MEMOBUS/Modbus communications test was performed during operation.
Always stop the operation of the converter before you perform MEMOBUS/Modbus
communications tests.
The phase order detection direction for the input power supply changed after the
power supply was turned on.
Investigate and correct the cause and reset the fault.
Refer to Diagnosing and Resetting Faults on page 121
One of the following conditions was true when the converter was stopped and a
Run command was entered:
• DC bus voltage dropped below the level specified in L2-05.
• Contactor to suppress inrush current in the converter was opened.
• Low voltage in the control converter input power. This alarm outputs only if
L2-01 is not 0 and DC bus voltage is under L2-05.
Check for wiring errors in the main circuit input power. Correct the wiring.
• Ensure the terminals have been properly tightened.
• Apply the tightening torque to the terminals as specified. Refer to
Torque on page 59.
• Check the voltage.
• Lower the voltage of the converter input power so that it is within the limits listed in the
specifications.
Improve the power supply.
• Check the maintenance time for the capacitors (U4-05).
• Replace either the control board or the entire converter if U4-05 exceeds 90%. For instructions
on replacing the control board, contact Yaskawa or your nearest sales representative.
• Check for an alarm when the magnetic contactor, line breaker, and leakage breaker are closed.
• Check the capacity of the converter input power transformer.
Check the temperature inside the converter.
Replace either the control board or the entire converter. For instructions on replacing the control
board, contact Yaskawa or your nearest sales representative.
A filter resonance fault was detected or there is a harmonic component on the
power supply side.
Investigate the source of the noise and implement countermeasures.
5.4 Alarm Detection
Detail
Possible Solutions
Detail
Possible Solutions
for details.
Detail
Possible Solutions
Wire Gauges and Tightening
Detail
Possible Solutions
Alarm
Output
(H2-=10)
YES
Alarm
Output
(H2-=10)
YES
Alarm
Output
(H2-=10)
YES
Alarm
Output
(H2-=10)
YES
5
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