Yaskawa Z1000 AC Drive HVAC User Manual
Page 217
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 Main Circuit Wire Gauges and
.
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.
Digital Operator Display
Minor Fault Name
WrUn
Waiting for Run
Cause
Possible Solutions
The Run command has been applied and
the b1-11 timer is active.
Adjust b1-11 to the desired delay time. The drive sill start normally after the b1-11 timer expires.
5.5 Alarm Detection
YASKAWA ELECTRIC TOEP YAIZ1U 03A YASKAWA AC Drive – Z1000 User Manual
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5
Troubleshooting