YASKAWA P1000 Technical Manual page 211

HOA Keypad Display
Uv
Cause
Phase loss in the drive input power
Loose wiring in the drive input power terminals
There is a problem with the drive input power
voltage
Drive internal circuitry is worn
The drive input power transformer is too small and
voltage drops when the power is switched on
Air inside the drive is too hot
The CHARGE light is broken or disconnected
HOA Keypad Display
voF
Cause
Hardware is damaged
HOA Keypad Display
WrUn
Cause
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
YASKAWA SIEP YAIP1B 01B YASKAWA AC Drive – P1000 Bypass Technical Manual
Undervoltage
One of the following conditions was true when the drive was stopped and a Run command was
entered:
• DC bus voltage dropped below the level specified in L2-05.
• Contactor to suppress inrush current in the drive was opened.
• Low voltage in the control drive input power. This alarm outputs only if L2-01 is not 0 and DC
bus voltage is under L2-05.
Check for wiring errors in the main circuit drive input power. Correct the wiring.
• Ensure the terminals have been properly tightened.
• Apply the tightening torque to the terminals as specified.
Torque Specifications on page
• Check the voltage.
• Lower the voltage of the drive input power so that it is within the limits listed in the specifications.
• 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.
• Check for an alarm when the magnetic contactor, line breaker, and leakage breaker are closed.
• Check the capacity of the drive input power transformer.
Check the temperature inside the drive.
Replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
Output Voltage Detection Fault
There is a problem with the output voltage.
Replace either the control board or the entire drive. For instructions on replacing the control board,
contact Yaskawa or your nearest sales representative.
Waiting for Run
A Run command has been issued and the drive is waiting to begin running the motor.
This is not an error.
Minor Fault Name
Possible Solutions
Refer to Wire Gauge and Tightening
43.
Minor Fault Name
Possible Solutions
Minor Fault Name
Possible Solutions
6.5 Alarm Detection
211
6