YASKAWA GA50U Series - Page 103

13 Troubleshooting
YASKAWA TOEPC71061752B GA500 Drive Installation & Primary Operation 103
Code Name Causes Possible Solutions
oL3 Overtorque Detection 1
A fault occurred on the machine.
Example: The machine is locked.
Examine the machine and remove the cause
of the fault.
The parameters are incorrect for
the load.
Adjust L6-02 [Torque Detection Level 1]
and L6-03 [Torque Detection Time 1]
settings.
oL4 Overtorque Detection 2
A fault occurred on the machine.
Example: The machine is locked.
Examine the machine and remove the cause
of the fault.
The parameters are incorrect for
the load.
Adjust L6-05 [Torque Detection Level 2]
and L6-06 [Torque Detection Time 2]
settings.
oL5
Mechanical Weakening
Detection 1
The drive detected overtorque as
specified by the conditions for
mechanical weakening detection
set in L6-08 [Mechanical Fatigue
Detect Select].
Do a deterioration diagnostic test on the
machine side.
oL7
High Slip Braking
Overload
The load inertia is too large.
An external force on the load side
rotated the motor.
Something is preventing
deceleration on the load side.
• Decrease deceleration times in C1-02,
C1-04, C1-06, and C1-08 [Deceleration
Times] for applications that do not use
High Slip Braking.
• Use a braking resistor to decrease the
deceleration time.
The value set in n3-04 [HSB
Overload Time] is too small.
• Increase the value set in n3-04.
• Connect a thermal overload relay to the
motor, and set n3-04 = 1200 s (maximum
value).
oPr
Keypad Connection
Fault
The keypad is not securely
connected to the connector on the
drive.
Examine the connection between the keypad
and the drive.
The connection cable between the
drive and the keypad is
disconnected.
• Remove the keypad and then reconnect
it.
• Replace the cable if damaged.
oS Overspeed
There is overshoot. • Decrease C5-01 [ASR Proportional Gain
1] and increase C5-02 [ASR Integral
Time 1].
• Use H6-02 to H6-05 [Pulse Train Input
Setting Parameters]to adjust the pulse
train gain.
There is an incorrect number of
PG pulses set in the drive.
Set H6-02 [Terminal RP Frequency Scaling]
to the pulse train frequency during 100%
reference (maximum motor rotation speed).
The oS detection level is set
incorrectly.
Adjust F1-08 [Overspeed Detection Level]
and F1-09 [Overspeed Detection Delay
Time].
If the drive detects the fault at start
or in the low speed range (10% or
less) and n8-57 = 1 [HFI Overlap
Selection = Enabled] for PM
Control methods, the high
frequency injection gain is too
high.
• Set E5-xx [PM Motor Parameters]
correctly or do Rotational Auto-Tuning.
• Decrease the value of n8-41 [HFI P
Gain] in 0.5 unit increments.
Note:
Set n8-41 > 0.0 for IPM motors.