YASKAWA CIPR-GA50C series Technical Manual page 257

Code Name
Note:
• The drive detects this error if the DC bus voltage changes irregularly without regeneration.
• Do a Fault Reset to clear the fault.
• Use L8-05 to enable and disable PF detection.
Code Name
PGo Encoder (PG) Feedback Loss
Note:
• Do a Fault Reset to clear the fault.
• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in F1-02 [PG Open Circuit Detection Select].
Code Name
rF Braking Resistor Fault
Note:
Do a Fault Reset to clear the fault.
Code Name
rH Braking Resistor Overheat
Note:
• The drive detects this error if the braking resistor overheat protective function is active.
• The magnitude of the braking load causes the braking resistor overheat alarm, NOT the surface temperature. If the duty cycle is higher than the braking resistor rating, the
drive will show the alarm.
• Do a Fault Reset to clear the fault.
• Parameter L8-01 enables and disables rH detection.
Code Name
rr Dynamic Braking Transistor Fault
Note:
Do a Fault Reset to clear the fault.
Code Name
SC Short Circuit/IGBT Failure
YASKAWA SIEPC71061753A GA500 Technical Manual
Causes
The main circuit capacitors have become
unserviceable.
Causes
The holding brake is stopping the motor.
Causes
The resistance of the dynamic braking option
connected to the drive is too low.
A regenerative converter or regenerative unit is
connected to the drive.
Causes
The deceleration time is too short and excessive
regenerative energy is flowing back into the drive.
The duty cycle is too high.
The braking load is too heavy.
The braking resistor is not sufficient.
Causes
The drive control circuit is damaged.
There is a malfunction in the internal braking
transistor of the drive.
Causes
Overheating caused damage to the motor or the
motor insulation is not satisfactory.
The motor main circuit cable is contacting ground
to make a short circuit.
A short circuit or ground fault on the drive output
side caused damage to the output transistor of the
drive.
Possible Solutions
• Examine the capacitor maintenance time in monitor U4-05
[CapacitorMaintenance]. If U4-05 is more than 90%, replace
the control board or the drive. For information about replacing
the control board, contact Yaskawa or your nearest sales
representative.
• If drive input power is correct and the fault stays, replace the
control board or the drive. For information about replacing the
control board, contact Yaskawa or your nearest sales
representative.
Possible Solutions
Release the holding brake.
Possible Solutions
Use a dynamic braking option that fits the model and duty rating
of the drive.
Set L8-55 = 0 [Internal DB TransistorProtection = Disable].
Possible Solutions
• Check the load level, deceleration time, and speed.
• Decrease the load.
• Increase the values set in C1-02, C1-04, C1-06, or C1-08
[Deceleration Times].
• Use a dynamic braking option that lets you use more power.
Examine the duty cycle.
Note:
When L8-01 = 1 [3% ERF DB Resistor Protection =
Enabled], the maximum braking duty cycle is 3%.
• Calculate the braking load and braking power again, and
decrease the braking load.
• Use a braking resistor that improves braking power.
Use the braking resistor specifications to select a sufficient
braking resistor.
Possible Solutions
• Re-energize the drive.
• If the fault stays, replace the control board or the drive. For
information about replacing the control board, contact
Yaskawa or your nearest sales representative.
Possible Solutions
Measure the motor insulation resistance, and replace the motor if
there is electrical conduction or unserviceable insulation.
• Examine the motor main circuit cable for damage, and repair
short circuits.
• Measure the resistance between the motor main circuit cable
and the ground terminal. If there is electrical conduction,
replace the cable.
• Make sure that there is not a short circuit in terminal B1 and
terminals U/T1, V/T2, and W/T3. Make sure that there is not a
short circuit in terminals - and terminals U/T1, V/T2, and W/
T3.
• If there is a short circuit, contact Yaskawa or your nearest sales
representative.
7.4 Faults
7
257