Omron Q2A-A Series Installation & Operation Instructions page 15

oL2 Drive Overload
ov Overvoltage
TOMPYEUOQ2A03B AC Drive Q2A Installation and Operation Instructions
L1-01 [Motor Cool Type for OL1 Calc] is set
incorrectly.
The V/f pattern does not fit the motor qualities.
E1-06 [Base Frequency] is set incorrectly.
One drive is operating more than one motor.
The electronic thermal protector qualities and the
motor overload properties do not match.
The electronic thermal protector is operating at an
incorrect level.
There is increased motor loss from overexcitation
operation.
The speed search-related parameters are set
incorrectly.
Phase loss in the input power supply is causing the
output current to change.
The load is too heavy.
The acceleration/deceleration times or cycle times
are too short.
The V/f pattern does not fit the motor qualities.
The drive capacity is too small.
Overload occurred while running at low speed.
The torque compensation gain is too large.
The speed search-related parameters are set
incorrectly.
Phase loss in the input power supply is causing the
output current to change.
Deceleration time is too short and regenerative
energy is flowing from the motor into the drive.
The acceleration time is too short.
The braking load is too large.
Set L1-01 in as specified by the motor qualities for a drive-
dedicated motor.
• Examine the ratios between the V/f pattern frequency and
voltage. Decrease the voltage if it is too high compared to the
frequency.
• Adjust V/f Pattern Parameters E1-04 to E1-10. For motor 2,
adjust E3-04 to E3-10. Decrease the values set in E1-08 [Mid
A Voltage] and E1-10 [Min Output Voltage].
Note:
If E1-08 and E1-10 are set too low, the overload tolerance will
decrease at low speeds.
Set E1-06 to the rated frequency shown on the motor nameplate.
Set L1-01 = 0 [Motor Cool Type for OL1 Calc = Disabled],
connect thermal overload relay to each motor to prevent damage
to the motor.
• Examine the motor qualities and set L1-01 [Motor Cool Type
for OL1 Calc] correctly.
• Connect a thermal overload relay to the motor.
Set E2-01 [Mot Rated Current (FLA)] to the value shown on the
motor nameplate.
• Lower the value set in n3-13 [OverExcBr Gain].
• Set L3-50 ≠ 3 or 4 [StallP@Decel Mode ≠ HiFlux
Overexcitation or HiFlux2 Overexcitation].
• Set L3-04 = 0 [StallP@Decel Enable = Disabled].
• Examine the settings for all speed search related parameters.
• Adjust b3-03 [SpSrch Deceleration Time].
• Set b3-24 = 1 [SpSrch Method Selection = Speed Estimation]
after Auto-Tuning.
Make sure that there is no phase loss, and repair problems.
Decrease the load.
• Examine the acceleration/deceleration times and the motor
start/stop frequencies (cycle times).
• Increase the value set in Acceleration/Deceleration Times C1-
01 to C1-08.
• Examine the ratios between the V/f pattern frequency and
voltage. Lower the voltage if it is too high compared to the
frequency.
• Adjust V/f Pattern Parameters E1-04 to E1-10. Lower the
values set in E1-08 [Mid A Voltage] and E1-10 [Min Output
Voltage] For motor 2, adjust E3-04 to E3-10.
Note:
If E1-08 and E1-10 are set too low, the overload tolerance is
will decrease at low speeds.
Replace the drive with a larger capacity model.
• Decrease the load when running at low speed.
• Replace the drive with a larger capacity model.
• Decrease the value set in C6-02 [Carrier Frequency
Selection].
Decrease the value set in C4-01 [Trq Comp Gain] to make sure
that the motor does not stall.
• Examine the settings for all speed search related parameters.
• Adjust b3-03 [SpSrch Deceleration Time].
• Set b3-24 = 1 [SpSrch Method Selection = Speed Estimation]
after Auto-Tuning.
• Correct any wiring errors in the main circuit drive input power.
• Make sure that there is no phase loss, and repair problems.
• Set L3-04 = 1 [StallP@Decel Enable = Enabled] and L3-50 =
0 [StallP@Decel Mode = General Purpose].
• Increase the values set in C1-02 [Decel Time 1], C1-04 [Decel
Time 2], C1-06 [Decel Time 3], or C1-08 [Decel Time 4].
• Connect a dynamic braking option to the drive.
• Perform Deceleration Rate Auto-Tuning.
• Make sure that sudden drive acceleration does not cause the
fault.
• Increase the values set in C1-01 [Accel Time 1], C1-03 [Accel
Time 2], C1-05 [Accel Time 3], or C1-07 [Accel Time 4].
• Increase the value set in C2-02 [Jerk@End of Accel].
• Set L3-11 = 1 [Overvolt Supression Select = Enabled].
Connect a dynamic braking option to the drive.
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