Omron SYSDRIVE 3G3RV Series User Manual page 365

Display Meaning
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
Overheating occurred in the inrush
resistor.
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).
Input Pha
This fault is detected when L8-05 is
Loss
set to "Enabled."
Output Open-phase
An open-phase occurred at the
Inverter output.
Output Pha
This fault is detected when L8-07 is
Loss
set to "Enabled."
Cooling Fin Overheating
The temperature of the Inverter's cool-
ing fins exceeded the setting in L8-02
or 105°C.
Heatsnk
OH: The temperature exceeded the
Overtmp
setting in L8-02 (Stopping method can
( )
be changed by L8-03.).
Heatsink
OH1: The temperature exceeded
MAX
100°C (Stopping method: Coast to
Temp
stop).
Inverter's Cooling Fan Stopped
Table 7.1 Fault Displays and Processing (Continued)
Probable Causes
• 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 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's maxi-
mum motor capacity.
The ambient temperature is too high.
There is a heat source nearby.
The Inverter's cooling fan has stopped. Replace the cooling fan. (Contact
The Inverter's cooling fan has stopped.
Protective and Diagnostic Functions
Corrective Actions
Reset the fault after correcting its
cause.
• 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.
Install a cooling unit.
Remove the heat source.
our sales representative.)
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