YASKAWA CIPR-GA50C series Technical Manual page 266

7.5 Minor Faults/Alarms
Code Name
Note:
• The drive detects this fault if the motor overheat signal input from analog input terminal A1 or A2 is more than the fault detection level.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in L1-03 [Motor Thermistor oH Alarm Select].
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.
• Set the conditions that trigger the minor fault using L6-01 [Torque Detection Selection 1].
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.
• Set the conditions that trigger the minor fault using L6-04 [Torque Detection Selection 2].
Code Name
oL5 Mechanical Weakening Detection 1
Note:
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the Stopping Method set in L6-08.
Code Name
oS Overspeed
Note:
• The drive detects this error if the motor speed is more than the value set in F1-08 for longer than F1-09.
• If the drive detects this error, the terminal set to H2-01 to H2-03 = 10 [MFDO Function Selection = Alarm] will activate.
• If the drive detects this error, it will operate the motor as specified by the stopping method set in F1-03 [Overspeed Detection Selection].
Code Name
ov Overvoltage
266
Causes
The motor has overheated.
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 detected overtorque as specified by the
conditions for mechanical weakening detection set
in L6-08 [Mechanical Fatigue Detect Select].
Causes
There is overshoot.
There is an incorrect number of PG pulses set in the
drive.
The oS detection level is set incorrectly.
Causes
There are surge voltages in the input power supply.
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.
Possible Solutions
• Check the load level, acceleration/deceleration time, and motor
start/stop frequency (cycle time).
• Decrease the load.
• Increase the values set in C1-01 to C1-08 [Acceleration/
Deceleration Times].
• Set E2-01 [Motor Rated Current (FLA)] correctly to the value
specified by the motor nameplate.
• Make sure that the motor cooling system is operating correctly,
and repair or replace it if it is damaged.
• Adjust E1-04 to E1-10 [V/f Pattern Parameters]. For motor 2,
adjust E3-04 to E3-10. Decrease the values set in E1-08 [Mid
Point A Voltage] and E1-10 [Minimum Output Voltage].
Note:
If the values set in E1-08 and E1-10 are too low, the overload
tolerance will decrease at low speeds.
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].
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].
Possible Solutions
Do a deterioration diagnostic test on the machine side.
Possible Solutions
• Decrease C5-01 [ASR Proportional Gain 1] and increase C5-
02 [ASR Integral Time 1].
• Adjust the pulse train gain with H6-02 to H6-05 [Pulse Train
Input Setting Parameters].
Set H6-02 [Terminal RP Frequency Scaling] to the pulse train
frequency during 100% reference (maximum motor rotation
speed).
Adjust F1-08 [Overspeed Detection Level] and F1-09 [Overspeed
Detection Delay Time].
Possible Solutions
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.
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 match the drive rated
voltage.
YASKAWA SIEPC71061753A GA500 Technical Manual