Omron SYSDRIVE RV Series User Manual page 423

Display Meaning
Main Circuit Overvoltage
The main circuit DC voltage exceeded
the overvoltage detection level.
200 V Class: Approx. 410 V
DC Bus
400 V Class: Approx. 820 V
Overvolt
(E1-01 ≥ 400 V)
Approx. 720 V
(E1-01 < 400 V)
Main Circuit Undervoltage
The main circuit DC voltage is below
the Undervoltage Detection Level
(L2-05).
200 V Class: Approx. 190 V
400 V Class: Approx. 380 V
DC Bus
Main Circuit MC Operation Failure
Undervolt
The MC stopped responding during
Inverter operation.
Applicable Inverter Capacities
200 V Class: 37 to 110 kW
400 V Class: 75 to 300 kW
Control Power Fault
The control power supply voltage
CTL PS
dropped.
Undervolt
Inrush Prevention Circuit Fault
Malfunction in the inrush prevention
circuit.
The MC did not respond for 10 s even
MC
though the MC ON signal has been
Answer-
output.
back
Applicable Inverter Capacities
200 V Class: 37 to 110 kW
400 V Class: 75 to 300 kW
Main Circuit Voltage Fault
The main circuit DC voltage oscillates
unusually (not when regenerating).
This fault is detected if a load is
Input Pha
greater than approximately 80% of the
Loss
maximum motor capacity.
This fault is detected when L8-05 is
set to 1.
Output Open-phase
An open-phase occurred at the
Inverter output.
Output Pha
This fault is detected when L8-07 is
Loss
set to 1 or 2.
Table 7.1 Fault Displays and Processing (Continued)
Probable Causes
The deceleration time is too short and
the regenerative energy from the
motor is too large.
The regenerative energy when an
overshoot occurs after acceleration is
completed is too large.
The power supply voltage is too high.
• An open-phase occurred with the
input power supply.
• A momentary power loss occurred.
• The wiring terminals for the input
power supply are loose.
• The voltage fluctuations in the input
power supply are too large.
• A fault occurred in the surge pre-
vention circuit.
The wiring of the control power cir-
cuit is incorrect.
• The MC in the main circuit failed.
• The MC excitation coil is burned
out.
• An open-phase occurred in the input
power supply.
• A momentary power loss occurred.
• The wiring terminals for the input
power supply are loose.
• The voltage fluctuations in the input
power supply are too large.
• The voltage balance between phases
is bad.
• There is a broken wire in the output
cable.
• There is a broken wire in the motor-
winding.
• The output terminals are loose.
The motor being used has a capacity
less than 5% of the Inverter rated out-
put current.
Protective and Diagnostic Functions
Corrective Actions
Increase the deceleration time or
connect a braking resistor (or
Braking Resistor Unit).
In vector control, enable (Set to 1)
the overvoltage inhibit selection
(L3-11).
Decrease the voltage so it's within
specifications.
Reset the fault after correcting its
cause.
• Fix the wiring.
• Try turning the power supply
off and on.
• Replace the Inverter if the fault
continues to occur.
• Try turning the power supply
off and on.
• Replace the Inverter if the fault
continues to occur.
Reset the fault after correcting its
cause.
Reset the fault after correcting its
cause.
Check the motor and Inverter
capacity.
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