YASKAWA Z1000 - Page 226

HOA Keypad Display Minor Fault Name
Cause Possible Solutions
Phase loss in the drive input power Check for wiring errors in the main circuit drive input power. Correct the wiring.
Loose wiring in the drive input power terminals
• Ensure the terminals have been properly tightened.
• Apply the tightening torque to the terminals as specified. Refer to Wire Gauges and Tightening
Torque on page 83.
There is a problem with the drive input power
voltage
• Check the voltage.
• Lower the voltage of the drive input power so that it is within the limits listed in the specifications.
Drive internal circuitry is worn
• Check the maintenance time for the capacitors (U4-05).
• Replace either the control board or the entire drive if U4-05 exceeds 90%. For instructions on
replacing the control board, contact Yaskawa or your nearest sales representative.
The drive input power transformer is too small and
voltage drops when the power is switched on
• Check for an alarm when the magnetic contactor, line breaker, and leakage breaker are closed.
• Check the capacity of the drive input power transformer.
Air inside the drive is too hot Check the temperature inside the drive.
The CHARGE light is broken or disconnected
Replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
HOA Keypad Display Minor Fault Name
voF
Output Voltage Detection Fault
There is a problem with the output voltage.
Cause Possible Solutions
Hardware is damaged
Replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
HOA Keypad Display Minor Fault Name
WrUn
Waiting for Run
A Run command has been issued and the drive is waiting to begin running the motor.
Cause Possible Solutions
After a Run command has been entered, the drive
must wait for the time set to b1-11 to pass before
it can begin to operate the motor
This is not an error.
5.5 Alarm Detection
226
YASKAWA ELECTRIC TOEP C710616 45F YASKAWA AC Drive – Z1000 User Manual