YASKAWA GA800 Series User Manual

19 Troubleshooting
YASKAWA TOEPC71061737B GA800 Drive Installation & Primary Operation 117
Code Name Causes Possible Solutions
The main circuit capacitors have become
unserviceable.
• 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.
PGo Encoder (PG) Feedback Loss
The encoder cable is disconnected or wired
incorrectly.
Examine for wiring errors or disconnected wires in the encoder
cable, and repair problems.
PGoH Encoder (PG) Hardware Fault
The encoder cable is disconnected. Connect any disconnected wires in the encoder cable.
rF Braking Resistor Fault
The resistance of the dynamic braking option that is
connected to the drive is too low.
Use a dynamic braking option that fits the model and duty rating of
the drive.
rH Braking Resistor Overheat
The deceleration time is too short and excessive
regenerative energy is flowing back into the drive.
• Check the load level, deceleration time, and speed.
• Decrease the load.
• Increase the value set in C1-02, C1-04, C1-06, or C1-08
[Deceleration Times].
• Use a dynamic braking option that lets you use more power.
The duty cycle is too high. Examine the duty cycle.
Note:
When L8-01 = 1 [3% ERF DB Resistor Protection = Enabled],
the maximum braking duty cycle is 3%.
The braking load is too large. • Calculate the braking load and braking power again, and
decrease the braking load.
• Use a braking resistor that improves braking power.
The braking resistor is not sufficient. Use the braking resistor specifications to select a sufficient braking
resistor.
rr Dynamic Braking Transistor Fault
There is damage to the drive control circuit.
There is a malfunction in the internal braking
transistor of the drive.
• 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.
SC Short Circuit/IGBT Failure
Overheating caused damage to the motor or the motor
insulation is not satisfactory.
Measure the motor insulation resistance, and replace the motor if
there is electrical conduction or unserviceable insulation.
SCF Safety Circuit Fault
The safety circuit is broken. Replace the control board or the drive. For information about
replacing the control board, contact Yaskawa or your nearest sales
representative.
SEr Speed Search Retries Exceeded
The speed search-related parameters are set
incorrectly.
• Decrease the value set in b3-10 [Speed Estimation Detection
Gain].
• Increase the value set in b3-17 [Speed Est Retry Current Level].
• Increase the value set in b3-18 [Speed Est Retry Detection Time].
• Do Auto-Tuning again.
STPo Motor Step-Out Detected
The motor code is set incorrectly for PM Control
Methods.
• Set E5-01 [PM Motor Code Selection] correctly as specified by
the motor.
• For specialized motors, refer to the motor test report and set E5-
xx correctly.
SvE Zero Servo Fault
The value set in the torque limit is too small. Adjust torque limit-related parameters L7-01 to L7-04.
TiM Keypad Time Not Set
There is a battery in the keypad, but the date and time
are not set.
Use the keypad to set the date and time.
UL3 Undertorque Detection 1
A fault occurred on the machine.
Example: There is a broken pulley belt.
Examine the machine and remove the cause of the fault.
UL4 Undertorque Detection 2
A fault occurred on the machine.
Example: There is a broken pulley belt.
Examine the machine and remove the cause of the fault.
UL5 Mechanical Weakening Detection 2
The drive detected undertorque as specified by the
conditions for mechanical weakening detection set in
L6-08 [Mechanical Fatigue Detect Select].
Examine the machine for deterioration.
Uv1 DC Bus Undervoltage
There is a phase loss in the drive input power. Correct errors with the wiring for main circuit drive input power.

YASKAWA GA800 Series Specifications

General

Series	GA800
Control Method	V/f Control
Overload Capacity	150% for 60 seconds
Communication	Ethernet/IP, Modbus RTU/TCP, PROFIBUS, PROFINET, DeviceNet
Safety	STO (Safe Torque Off)
Enclosure	IP00, IP20, IP55
Protection Features	Overcurrent, Overvoltage, Undervoltage, Overheating, Ground Fault, Short Circuit
Enclosure Rating	IP00, IP20, IP55
Voltage Class	200V, 400V