Yaskawa AC Drive Z1000 Bypass Technical Manual Instrukcja Użytkownika Pobierz pdf (Strona 236)

There is phase loss in the drive input power

• Check for wiring errors in the main circuit drive input power.

• Correct the wiring.

There is loose wiring in the drive input power

terminals

• Ensure the terminals are tightened properly.

• Apply the tightening torque as specified in this manual. Refer to Wire Gauge and Tightening

Torque Specifications on page 62 for details.

There is excessive fluctuation in the drive input

power voltage

• Check the voltage from the drive input power.

• Review the possible solutions for stabilizing the drive input power.

There is poor balance between voltage phases Stabilize drive input power or disable phase loss detection.

The main circuit capacitors are worn

• Check the maintenance time for the capacitors (U4-05).

• Replace the capacitor if U4-05 is greater than 90%. For instructions on replacing the capacitor,

contact Yaskawa or a Yaskawa representative.

Check for problems with the drive input power. If drive input power appears normal but the alarm

continues to occur, replace either the control board or the entire drive. For instructions on replacing

the control board, contact Yaskawa or a Yaskawa representative.

HOA Keypad Display Fault Name

SEr

Too Many Speed Search Restarts

The number of Speed Search restarts exceeded the value set to b3-19.

Cause Possible Solution

Parameters related to Speed Search are set to the

wrong values

• Reduce the detection compensation gain during Speed Search (b3-10).

• Increase the current level when attempting Speed Search (b3-17).

• Increase the detection time during Speed Search (b3-18).

The motor is coasting in the opposite direction of

the Run command

Set b3-14 to 1 to enable Bi-Directional Speed Search.

HOA Keypad Display Fault Name

STo

Motor Pull Out or Step Out Detection

Motor pull out or step out has occurred. Motor has exceeded its pull-out torque.

Cause Possible Solution

Load is too heavy

• Increase the pull-in current during accel/decel (n8-51).

• Reduce the load.

• Increase the motor or drive capacity.

Acceleration and deceleration times are too short

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

• Increase the S-curve acceleration and deceleration times (C2-01).

HOA Keypad Display Fault Name

TdE Time Data Error

Cause Possible Solution

An error has occurred in the Real-Clock Time

function of the HOA keypad

Replace the HOA keypad. For instructions on replacing the HOA keypad, contact Yaskawa or your

nearest sales representative.

A communication error has occurred with the

Real-Clock Time function of the HOA keypad

HOA Keypad Display Fault Name

TIM Time Not Set

Cause Possible Solution

The time for the HOA keypad has not been set Set the time for the HOA keypad.

The HOA keypad battery is low or the battery has

been replaced

Replace the HOA keypad battery and set the current time.

An error has occurred in the Real-Time Clock

function of the HOA keypad

Replace the HOA keypad. For instructions on replacing the HOA keypad, contact Yaskawa or your

nearest sales representative.

HOA Keypad Display Fault Name

UL3

Undertorque Detection 1

The current has fallen below the minimum value set for torque detection (L6-02) for longer than the

allowable time (L6-03).

Cause Possible Solution

Parameter settings are not appropriate for the load Check the settings of parameters L6-02 and L6-03.

6.4 Fault Detection

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