YASKAWA P1000 Technical Manual page 194

6.4 Fault Detection
HOA Keypad Display
The wrong motor rated current is set to E2-01
The maximum output frequency is set incorrectly Check the E1-03 setting.
Multiple motors are running off the same bypass Set L1-01 to 0 to disable the motor protection function and then install a thermal relay to each motor.
The electrical thermal protection characteristics
and motor overload characteristics do not match.
The electrical thermal relay is operating at the
wrong level.
HOA Keypad Display
FB06
Cause
Load is too heavy
Cycle times are too short during acceleration and
deceleration
A general-purpose motor is driven below the rated
speed with a high load
HOA Keypad Display
FB07
Cause
Load is too heavy
Cycle times are too short during acceleration and
deceleration
A general-purpose motor is driven below the rated
speed with a high load
HOA Keypad Display
FB08
Cause
Input power is too low.
Settings for brownout are incorrect.
HOA Keypad Display
FB09
Cause
Input power is too low or has dipped too low.
Settings for blackout are incorrect.
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• Check the motor-rated current.
• Enter the motor rated current to parameter E2-01 as indicated on the motor nameplate.
• Check the motor characteristics.
• Correct the type of motor protection that has been selected (L1-01).
• Install an external thermal relay.
• Check the current rating listed on the motor nameplate.
• Check the value set for the motor rated current (E2-01)
External Motor 1 Overload
Note: A fault reset is not required. An EF0 is sent to the drive and bypass Contactor K3 is
opened.
External overload input is active for motor 1
Reduce the load.
Increase the acceleration and deceleration times (C1-01 and C1-02).
• Reduce the load.
• Increase the speed.
• If the motor is supposed to operate at low speeds, either increase the motor capacity or use a motor
specifically designed to operate in the desired speed range.
External Motor 2 Overload
Note: A fault reset is not required. An EF0 is sent to the drive and bypass contactor K3 is
opened.
External overload input is active for motor 2
Reduce the load.
Increase the acceleration and deceleration times (C1-01 and C1-02).
• Reduce the load.
• Increase the speed.
• If the motor is supposed to operate at low speeds, either increase the motor capacity or use a motor
specifically designed to operate in the desired speed range.
Phase Loss Brownout
Note: A fault reset is required. An EF0 is sent to the drive and drive output contactor K2 and
Bypass contactor K3 are opened.
The contactor coil voltage was continuously detected below the configured brownout voltage level
for the configured brownout time.
Verify input power is sufficient to power the bypass.
Verify Z1-27 (Brownout Voltage Level) and Z1-28 (Brownout Time) are set properly.
Phase Loss Blackout
Note: A fault reset is required. An EF0 is sent to the drive and drive output contactor K2 and
Bypass contactor K3 are opened.
The contactor coil voltage was detected below the configured blackout voltage level.
Verify input power is sufficient to power the bypass.
Verify Z1-29 (Blackout Voltage Level) is set properly.
YASKAWA SIEP YAIP1B 01B YASKAWA AC Drive – P1000 Bypass Technical Manual
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