YASKAWA HV600 Technical Reference page 506

6.6 Minor Faults/Alarms
Code Name
oL3 Overtorque 1
Note:
• The drive detects this fault if the drive output current is more than the level set in L6-02 for longer than L6-03.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• Use L6-01 [Torque Detection Selection 1] to set the conditions that trigger the minor fault.
Code Name
oL4 Overtorque 2
Note:
• The drive detects this error if the drive output current is more than the level set in L6-05 for longer than L6-06.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• Use L6-04 [Torque Detection Selection 2] to set the conditions that trigger the minor fault.
Code Name
ov DC Bus Overvoltage
Note:
• The drive detects this error if the DC bus voltage is more than the ov detection level when the Run command has not been input (while the drive is stopped).
• The ov detection level is approximately 410 V for 208/240 V bypasses. The detection level is approximately 820 V for 480 V bypasses.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
Code Name
ovEr Too Many Parameters Changed
Code Name
OV_PRESS Over Pressure Detected
Code Name
PASS Modbus Communication Test
Code Name
PF Input Phase Loss
506
Causes
A fault occurred on the machine.
Example: The machine is locked.
The parameters are incorrect for the load.
Causes
A fault occurred on the machine.
Example: The machine is locked.
The parameters are incorrect for the load.
Causes
The drive output cable or motor is shorted to ground
(the current short to ground is charging the main
circuit capacitor of the drive through the power
supply).
The power supply voltage is too high.
Electrical interference caused a drive malfunction.
Causes
You tried to change more than 150 parameters.
Causes
The bypass detected an Over Pressure condition.
Causes
The MEMOBUS/Modbus communications test is
complete.
Causes
There is a phase loss in the drive input power.
Loose wiring in the input power terminals.
The drive input power voltage is changing too much.
Unsatisfactory balance between voltage phases.
YASKAWA SIEPYAIH6B01A HV600 AC Drive Bypass Technical Reference
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
1. Examine the motor main circuit cable, terminals, and motor
terminal box, and then remove ground faults.
2. Re-energize the drive.
Decrease the power supply voltage to align with the drive rated
voltage.
• Examine the control circuit lines, main circuit lines, and ground
wiring, and minimize the effects of noise.
• Find the source of the noise. If a magnetic contactor is the
source, use Surge Protective Device if necessary.
• Set L5-01 ≠ 0 [Number of Auto-Restart Attempts ≠ 0 times].
Possible Solutions
Make sure that parameters that do not have an effect on drive
operation are at their default settings.
Note:
• You can change 150 parameters maximum.
• If you change parameters that have dependencies, the drive
can detect ovEr when the number of changed parameters is
fewer than 150.
Possible Solutions
• Check the digital input programmed for Over Pressure Switch
(Z2-0x = 41).
• Check the connected device for continuity.
• Check Bypass Digital Input Invert Settings in Z2-09 to Z2-16.
Possible Solutions
The PASS display will turn off after communications test mode is
cleared.
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.
• 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.