YASKAWA Z1000 Technical Manual page 243

HOA Keypad Display
Uv1
Cause
Input power phase loss
One of the drive input power wiring terminals is
loose
There is a problem with the voltage from the drive
input power
The power has been interrupted
The main circuit capacitors are worn
The relay or contactor on the soft-charge bypass
circuit is damaged
<1> Details on this function can be found in the standard Z1000 Programming Manual (SIEPC71061645) at www.yaskawa.com.
HOA Keypad Display
Uv2
Cause
Internal circuitry is damaged
HOA Keypad Display
Uv3
Cause
The relay or contactor on the soft-charge bypass
circuit is damaged
HOA Keypad Display
voF
Cause
Hardware is damaged
YASKAWA ELECTRIC SIEP YAIZ1B 01E YASKAWA AC Drive – Z1000 Bypass Technical Manual
DC Bus Undervoltage
Voltage in the DC bus fell below the undervoltage detection level (L2-05).
• For 208 V: approximately 190 V
• For 480 V: approximately 440 V
The fault is output only if L2-01 is set to 0 or 1 and the DC bus voltage has fallen below the level set
to L2-05 for longer than the time set to L2-02
• The main circuit drive input power is wired incorrectly.
• Correct the wiring.
• Ensure there are no loose terminals.
• Apply the tightening torque specified in this manual to fasten the terminals.
and Tightening Torque Specifications on page 62
• Check the voltage.
• Correct the voltage to be within the range listed in drive input power specifications.
• If there is no problem with the power supply to the main circuit, check for problems with the main
circuit magnetic contactor.
Correct the drive input power.
• 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 a Yaskawa representative.
• Cycle power to the drive and see if the fault reoccurs.
• If the problem continues, replace either the control board or the entire drive. For instructions on
replacing the control board, contact Yaskawa or a Yaskawa representative.
• Check monitor U4-06 for the performance life of the soft-charge bypass.
• Replace either the control board or the entire drive if U4-06 exceeds 90%. For instructions on
replacing the control board, contact Yaskawa or a Yaskawa representative.
Control Power Supply Voltage Fault
Voltage is too low for the control drive input power.
• Cycle power to the drive. Check if the fault reoccurs.
• If the problem continues, replace either the control board or the entire drive. For instructions on
replacing the control board, contact Yaskawa or a Yaskawa representative.
Undervoltage 3 (Soft-Charge Circuit Fault)
The soft-charge bypass circuit failed.
• Cycle power to the drive and see if the fault reoccurs.
• If the problem continues, replace either the control board or the entire drive. For instructions on
replacing the control board, contact Yaskawa or a Yaskawa representative.
• Check monitor U4-06 for the performance life of the soft-charge bypass.
• Replace either the control board or the entire drive if U4-06 exceeds 90%. For instructions on
replacing the control board, contact Yaskawa or a Yaskawa representative.
Output Voltage Detection Fault
Problem detected with the voltage on the output side of the drive.
Replace the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or a Yaskawa representative.
6.4 Fault Detection
Fault Name
<1>
.
Possible Solution
for details.
Fault Name
Possible Solution
Fault Name
Possible Solution
Fault Name
Possible Solution
Refer to Wire Gauge
6
243