YASKAWA GA700 Series Technical Manual page 347

Code Name
Note:
• The drive detects this error if motor rotation position moves during Zero Servo.
• Do a Fault Reset to clear the fault.
Code Name
TiM Keypad Time Not Set
Note:
• Do a Fault Reset to clear the fault.
• Parameter o4-24 [bAT Detection Selection] enables and disables TiM detection.
Code Name
UL3 Undertorque Detection 1
Note:
• The drive detects this error if the drive output current is less than the level set in L6-02 for longer than L6-03.
• 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 L6-01 [Torque Detection Selection 1].
Code Name
UL4 Undertorque Detection 2
Note:
• The drive detects this error if the drive output current is less than the level set in L6-05 for longer than L6-06.
• 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 L6-04 [Torque Detection Selection 2].
Code Name
UL5 Mechanical Weakening Detection 2
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 L6-08.
Code Name
Uv1 DC Bus Undervoltage
Note:
• The drive detects this error if the DC bus voltage decreases below the level set in L2-05 [Undervoltage Detection Lvl (Uv1)] while the drive is running.
• The Uv1 detection level is approximately 190 V for a 200 V class drives. The detection level is approximately 380 V for 400 V class drives. The detection level is
approximately 350 V when E1-01 [Input AC Supply Voltage] < 400.
• Do a Fault Reset to clear the fault.
• Fault trace is not available for this fault.
• L5-08 [Fault Reset Enable Select Grp2] disables the Auto Restart function.
YASKAWA SIEPC71061705H GA700 Series Technical Manual
Causes
Noise interference along the encoder cable
Causes
There is a battery in the keypad, but the date and
time are not set.
Causes
A fault occurred on the machine.
Example: There is a broken pulley belt.
The parameters are incorrect for the load.
Causes
A fault occurred on the machine.
Example: There is a broken pulley belt.
The parameters are incorrect for the load.
Causes
The drive detected undertorque as specified by the
conditions for mechanical weakening detection set
in L6-08 [Mechanical Fatigue Detect Select].
Causes
There is a phase loss in the drive input power.
There is loose wiring in the drive input power
terminals.
The drive input power voltage is changing too
much.
There was a loss of power.
The main circuit capacitors have become
unserviceable.
The relay or contactor on the soft-charge bypass
relay is damaged.
Possible Solutions
Isolate the encoder cable from the drive output line or a different
source of electrical interference.
Possible Solutions
Use the keypad to set the date and time.
Possible Solutions
Examine the machine and remove the cause of the fault.
Adjust L6-02 [Torque Detection Level 1] and L6-03 [Torque
Detection Time 1] settings.
Possible Solutions
Examine the machine and remove the cause of the fault.
Adjust L6-05 [Torque Detection Level 2] and L6-06 [Torque
Detection Time 2] settings.
Possible Solutions
Examine the machine for deterioration.
Possible Solutions
Correct errors with the wiring for main circuit drive input power.
Tighten the terminal screws to the correct tightening torque.
• Examine the input power for problems.
• Make the drive input power stable.
• If the input power supply is good, examine the magnetic
contactor on the main circuit side for problems.
Use a better power supply.
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.
U4-06 [PreChargeRelayMainte] shows the performance life of
the soft-charge bypass relay. If U4-06 is more than 90%, replace
the board or the drive. For information about replacing the board,
contact Yaskawa or your nearest sales representative.
7.4 Fault
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