YASKAWA GA700 Technical Manual page 304

6.5 Minor Faults/Alarms
Code Name
oH3 Motor Overheat
Note:
• Detected if the motor overheat signal entered to an analog input terminal A1, A2, or A3 exceeds the alarm detection level. (If H3-02,
H3-10, or H3-06 = E [MFAI Function Select = Motor Temperature (PTC input)] has been set.)
• If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
• If detected, the drive will operate the motor according to the stop method set in L1-03 [Motor OH Alarm Operation Select].
Code Name
oL3 Overtorque 1
Note:
• Detected if the drive output current exceeded the value set in L6-02 [Torque Detection Level 1] for longer than L6-03 [Torque
Detection Time 1].
• If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
• If detected, the drive will operate the motor according to the stop method set in L6-01 [Torque Detection Selection 1].
Code Name
oL4 Overtorque 2
Note:
• Detected if the drive output current exceeded the level set in L6-05 [Torque Detection Level 2] for longer than L6-06 [Torque
Detection Time 2].
• If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
• If detected, the drive will operate the motor according to the stop method set in L6-04 [Torque Detection Selection 2].
Code Name
oL5 Mechanical Weakening
Detection 1
Note:
• If detected, H2-xx = 10 [MFDO Function Select = Minor Fault] will be ON.
• If detected, the drive will operate the motor according to the stop method set in L6-08 [Mechanical Weakening Detect Ope].
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Cause
The wiring with the thermistor used to
detect motor temperature is faulty.
A fault occurred on the machine side.
Example: The machine is locked.
The motor has overheated.
Cause
A fault occurred on the machine side.
Example: The machine is locked.
The parameters for load are not
appropriate.
Cause
A fault occurred on the machine side.
Example: The machine is locked.
The parameters for load are not
appropriate.
Cause
Overtorque was detected based on the
conditions for mechanical weakening
detection set in L6-08 [Mechanical
Weakening Detect Ope].
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Possible Solution
Correct any wiring errors.
Check the condition of the machine and remove the
cause of the fault.
• Check the load level, acceleration/deceleration
time, and motor start/stop frequency (cycle
time).
• Reduce the load.
• Increase the value set in C1-01 to C1-08
[Acceleration/Deceleration Time].
• Set E2-01 [Motor Rated Current (FLA)]
correctly to the value that indicated on the motor
nameplate.
• Check whether the motor cooling system is
operating normally, 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. In particular,
reduce the values set in E1-08 [Mid Point A
Voltage] and E1-10 [Minimum Output Voltage].
Note:
If E1-08 and E1-10 are reduced too much, the
overload tolerance is reduced at low speeds.
Possible Solution
Check the condition of the machine and remove the
cause of the fault.
Adjust L6-02 and L6-03.
Possible Solution
Check the condition of the machine and remove the
cause of the fault.
Adjust L6-05 and L6-06.
Possible Solution
Perform deterioration diagnostics on the machine
side.