YASKAWA GA700 Technical Manual page 372

6.5 Minor Faults/Alarms
Code Name
STo Safe Torque OFF
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
Code Name
SToF Safe Torque OFF Hardware One of the two terminals H1-HC or H2-
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
Code Name
TiM Keypad Time Not Set
Note:
• o4-24 [bAT Detection selection] enables and disables TiM detection.
• If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
Code Name
TrPC IGBT Maintenance Time
(90%)
Note:
If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
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.
• If the drive detects this error, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
• 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.
• If detected, the terminal assigned to H2-01 to H2-03 = 10 [MFDO Function Select = Alarm] will be ON.
• 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].
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Causes
Safe Disable inputs H1-HC and H2-HC
are open.
There is internal damage to the two Safe
Disable channels.
Causes
HC received the Safe Disable input
signal.
The Safe Disable input signal is wired
incorrectly.
There is internal damage to one Safe
Disable channel.
Causes
There is a battery in the keypad, but the
date and time are not set.
Causes
The IGBT is at 90% of its expected
performance life.
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.
YASKAWA ELECTRIC SIEP C710617 05F YASKAWA AC Drive GA700 Technical Manual
Possible Solutions
• Make sure that the Safe Disable signal is input
from an external source to terminal H1-HC and
H2-HC.
• When the Safe Disable function is not in use,
connect terminals H1-HC and H2-HC.
Replace the control board or the drive. For
information about replacing the control board,
contact Yaskawa or your nearest sales
representative.
Possible Solutions
• Make sure that the Safe Disable signal is input
from an external source to terminal H1-HC and
H2-HC.
• When the Safe Disable function is not in use,
connect terminals H1-HC and H2-HC.
Replace the control board or the drive. For
information about replacing the control board,
contact Yaskawa or your nearest sales
representative.
Possible Solutions
Set the date and time with the keypad.
Possible Solutions
Replace the IGBT or the drive. For information
about replacing the control board, contact Yaskawa
or your nearest sales representative.
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.