Yaskawa AC Drive Z1000 Bypass Technical Manual Instrukcja Użytkownika Pobierz pdf (Strona 228)

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.

• Check the motor characteristics.

• Correct the type of motor protection that has been selected (L1-01).

• Install an external thermal relay.

The electrical thermal relay is operating at the

wrong level.

• Check the current rating listed on the motor nameplate.

• Check the value set for the motor rated current (E2-01)

HOA Keypad Display Fault Name

FB06

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

Cause Possible Solution

Load is too heavy Reduce the load.

Cycle times are too short during acceleration and

deceleration

Increase the acceleration and deceleration times (C1-01 and C1-02).

A general-purpose motor is driven below the rated

speed with a high load

• 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.

HOA Keypad Display Fault Name

FB07

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

Cause Possible Solution

Load is too heavy Reduce the load.

Cycle times are too short during acceleration and

deceleration

Increase the acceleration and deceleration times (C1-01 and C1-02).

A general-purpose motor is driven below the rated

speed with a high load

• 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.

HOA Keypad Display Fault Name

FB08

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.

Cause Possible Solution

Input power is too low. Verify input power is sufficient to power the bypass.

Settings for brownout are incorrect. Verify Z1-27 (Brownout Voltage Level) and Z1-28 (Brownout Time) are set properly.

HOA Keypad Display Fault Name

FB09

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.

Cause Possible Solution

Input power is too low or has dipped too low. Verify input power is sufficient to power the bypass.

Settings for blackout are incorrect. Verify Z1-29 (Blackout Voltage Level) is set properly.

6.4 Fault Detection

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