YASKAWA CIPR-GA50C series, Техническое руководство

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7.4 Faults
256 YASKAWA SIEPC71061753A GA500 Technical Manual
Code Name Causes Possible Solutions
The braking load is too large. Connect a dynamic braking option to the drive.
There are surge voltages in the input power supply Connect a DC reactor to the drive.
Note:
If you turn the phase advancing capacitors ON and OFF and
use thyristor converters in the same power supply system,
there can be surge voltages that irregularly increase the input
voltage.
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). 1. Examine the motor main circuit cable, terminals, and motor
terminal box, and then remove ground faults.
2. Re-energize the drive.
If the drive detects ov in these conditions, the speed
search-related parameters are incorrect.
•
During speed search
•
During momentary power loss recovery
•
When the drive starts again automatically
• Examine the settings for all speed search related parameters.
• Set b3-19 ≠ 0 [Speed Search Restart Attempts ≠ 0 times] .
• Adjust b3-03 [Speed Search Deceleration Time] .
• Do Stationary Auto-Tuning for Line-to-Line Resistance and
then set
b3-24 = 1 [Speed Search Method Selection = Speed
Estimation] .
The power supply voltage is too high. Decrease the power supply voltage to match the drive rated
voltage.
The braking resistor or braking resistor unit wiring
is incorrect. Correct wiring errors in the connection to the braking resistor or
braking resistor unit.
Electrical interference caused a drive malfunction. • Examine the control circuit lines, main circuit lines, and
ground wiring, and decrease the effects of electrical
interference.
• Make sure that a magnetic contactor is not the source of the
electrical interference, then use a Surge Protective Device if
necessary.
The load inertia is set incorrectly. • Examine the load inertia settings with KEB, overvoltage
suppression, or stall prevention during deceleration.
•
Adjust L3-25 [Load Inertia Ratio] to match the qualities of the
machine.
The Short Circuit Braking function used in OLV/
PM control method. Connect a braking resistor to the drive.
There is motor hunting. • Set n1-01 = 1 [Hunting Prevention Selection = Enabled] and
adjust n1-02 [Hunting Prevention Gain Setting] .
•
Adjust n2-02 [Automatic Freq Regulator Time 1] and n2-03
[Automatic Freq Regulator Time 2] .
• Adjust n8-45 [Speed Feedback Detection Gain] and n8-47
[Pull-in Current Comp Filter Time] .
Speed search does not complete at start when you
set
A1-02 = 8 [EZ Vector Control] and use an
induction motor.
When E9-01 = 0 [Motor Type Selection = Induction (IM)] , set b3-
24 = 2 [Speed Search Method Selection = Current Detection
Speed Search]
.
Note:
•
The drive detects this error if the DC bus voltage is more than the ov detection level while the drive is running.
•
The ov detection level is approximately 410 V with 200 V class drives. The detection level is approximately 820 V for 400 V class drives.
•
Do a Fault Reset to clear the fault.
•
L5-08 [Fault Reset Enable Select Grp2] disables the Auto Restart function.
Code Name Causes Possible Solutions
PE1, PE2 PLC Faults The communication option detected a fault. Refer to the manual for the communication option card.
Note:
Do a Fault Reset to clear the fault.
Code Name Causes Possible Solutions
PF Input Phase Loss
There is a phase loss in the drive input power. Correct errors with the wiring for main circuit drive input power.
There is loose wiring in the drive input power
terminals. Tighten the terminal screws to the correct tightening torque.
The drive input power voltage is changing too
much. • 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.
There is unsatisfactory balance between voltage
phases.
•
Examine the input power for problems.
•
Make the drive input power stable.
•
Set L8-05 = 0 [Input Phase Loss Protection Sel = Disabled] .