Yaskawa RC5 Converter - Manual (Page 50)

50 YASKAWA ELECTRIC TOEP C710656 01C YASKAWA - RC5 Instruction Manual
6.1 Fault Detection
6.1 Fault Detection
When the power regenerative unit detects a fault, the fault code is displayed on the Digital Operator and the fault contact output operates.
When a fault has occurred, refer to the following table to identify and correct the cause of the fault.
Use one of the following methods to reset the fault after restarting the power regenerative unit.
• Turn ON the fault reset signal.
• Press the RESET Key on the Digital Operator.
• Turn the main circuit power supply OFF and then ON again.
Table 6.1 Fault Displays and Processing
Fault Display Meaning Probable Causes Corrective Actions
PUF
IGBT, Fuse Failure
Fuse Blown
The fuse in the main circuit is blown.
The main transistor has damaged.
The output transistor has failed because
of a short-circuit or overcurrent. Replace the power regenerative unit
after correcting the cause.
UV1
Dc Bus Undervolt
Main Circuit Undervoltage
The main circuit DC voltage is below
the undervoltage detection level
(L2-05).
200 V class: Approx. 190 VDC
400 V class: Approx. 380 VDC
• An open-phase occurred with the
input power supply.
• A momentary power loss occurred.
• The wiring terminals for the input
power supply are loose.
Reset the fault after correcting its cause.
UV2
CTR PS Undervolt
Control Power Fault
The control power supply voltage
dropped.
—
• Try turning the power supply off and
on.
• Replace the power regenerative unit if
the fault continues to occur.
UV3
MC Answerback
Inrush Prevention Circuit Fault
A fault occurred in the inrush
prevention circuit.
—
• Try turning the power supply off and
on.
• Replace the power regenerative unit if
the fault continues to occur.
AUv
Ac Undervoltage
AC Power Undervoltage
AC power undervoltage occurred
during running.
200 V class: Approx. 150 VAC or less
400 V class: Approx. 300 VAC or less • An open-phase occurred with the
input power supply.
• A momentary power loss occurred.
• The wiring terminals for the input
power supply are loose.
Reset the fault after correcting its cause.
FdVe
Power F Fault
Power Supply Frequency Fault
AC power supply frequency has
exceeded the setting value (F1-10). • The power supply fluctuations
occurred during running.
• Power loss occurred during running.
Reset the fault after correcting its cause.
SrC
Power Supply Flt.
Power Supply Fault
The phase of the input power supply has
changed after turning ON the control
power supply.
• An open-phase occurred with the
input power supply.
• A momentary power loss occurred.
• The wiring terminals for the input
power supply are loose.
Reset the fault after correcting its cause.
OC
Over Current
Overcurrent
The output current of the power
regenerative unit exceeded the
overcurrent detection level.
(200% of rated current)
• A short-circuit occurred at the power
regenerative output.
• Power supply drop
• Faulty wiring
Reset the fault after correcting its cause.
SC
Short Circuit
IGBT Short-circuit
The IGBT gate signal was short-
circuited.
A short-circuit of the PWM signal
occurred.
Replace the control card.
OV
Dc Bus Overvolt
Main Circuit Overvoltage
The main circuit DC voltage exceeded
the overvoltage detection level.
200 V class: Approx. 400 VDC
400 V class: Approx. 800 VDC The deceleration time is too short and
the regenerative energy from the motor
is too large.
• Increase the deceleration time.
• Check the capacity of the power
regenerative unit.
• (Increase the capacity.)
The power supply voltage is too high.
Decrease the voltage so it is within
specifications.
OH
Heatsink Overtmp
Heatsink Overheating
The temperature of the power
regenerative unit’s cooling fins
exceeded the setting in L8-02.
(Stopping method can be changed by
L8-03.) The ambient temperature is too high. Install a cooling unit.
There is a heat source nearby. Remove the heat source.
The cooling fan of the power
regenerative unit has stopped. Replace the cooling fan. (Contact our
sales representative.)
OH1
Heatsink Max temp
Heatsink Overheating
The temperature of the power
regenerative unit’s cooling fins
exceeded 105°C.
(Stopping method: Coast to stop) The ambient temperature is too high. Install a cooling unit.
There is a heat source nearby. Remove the heat source.
The cooling fan of the power
regenerative unit has stopped. Replace the cooling fan. (Contact our
sales representative.)