YASKAWA GA700 Technical Manual page 287

Code Name
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.)
• Perform Fault Reset to clear the fault.
• If detected, the drive will operate the motor according to the stop method set in L1-03 [Motor OH Alarm Operation Select].
Code Name
oH4 Motor Overheat Fault (PTC
Input)
Note:
• Detected if the motor overheat signal to analog input terminal A1, A2, or A3 exceeds the fault detection level. (If H3-02, H3-10, or
H3-06 = E [MFAI Function Select = Motor Temperature (PTC input)] has been set.)
• Perform Fault Reset to clear the fault.
Code Name
oL1 Motor Overload
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Cause
The motor has overheated.
Cause
The motor has overheated.
Cause
The load is too heavy.
The acceleration/deceleration time or
cycle time is too short.
Possible Solution
• 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 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
Reduce the load.
Note:
Reset oL1 after U4-16 [MotorOLEstimate(oL1)]
has fallen below 100. The value set in U4-16
must be less than 100 before oL1 can be reset.
• Check the acceleration/deceleration time and the
motor start/stop frequency (cycle time).
• Increase the value set in C1-01 to C1-08
[Acceleration/Deceleration Time].
6.4 Fault
6
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