YASKAWA T1000V, Техническое руководство

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6.4 Fault Detection
YASKAWA ELECTRIC SIEP C710606 44B YASKAWA AC Drive T1000V Technical Manual 255
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LED Operator Display Fault Name
Uv1
DC Bus Undervoltage
One of the following conditions occurred while the drive was in operation:
• Voltage in the DC bus fell below the undervoltage detection level (L2-05).
• For 200 V class: approximately 190 V (160 V for single phase drives)
• For 400 V class: approximately 380 V (350 V when E1-01 is less than 400) The fault is output
only if L2-01 = 0 or L2-01 = 1 and the DC bus voltage is under L2-05 for longer than L2-02.
Cause Possible Solution
Input power phase loss.
• The main circuit drive input power is wired incorrectly.
• Correct the wiring.
One of the drive input power wiring
terminals is loose.
• Ensure there are no loose terminals.
• Apply the tightening torque specified in this manual to fasten the terminals.
Refer to Wire Gauges
and Tightening Torque on page 53
There is a problem with the voltage from
the drive input power. • Check the voltage.
• Correct the voltage to within range listed in drive input power specifications.
The power has been interrupted. Correct the drive input power.
Drive internal circuitry has become worn.
• Check the maintenance time for the capacitors (U4-05).
• Replace the drive if U4-05 exceeds 90%.
The drive input power transformer is not
large enough and voltage drops after
switching on power.
Check the capacity of the drive input power transformer.
Air inside the drive is too hot. Check the drive internal temperature.
Problem with the CHARGE indicator. Replace the drive.
LED Operator Display Fault Name
Uv2
Control Power Supply Voltage Fault
Voltage is too low for the control drive input power.
Cause Possible Solution
L2-02 changed from its default value in
drive that is 7.5 kW or smaller without
installing a Momentary Power Loss Ride-
Thru.
Correct parameter L2-02 setting or install optional Momentary Power Loss Ride-Thru unit.
The wiring for the control power supply is
damaged. • Cycle power to the drive. Check if the fault reoccurs.
• Replace the drive if the fault continues to occur.
Internal circuitry is damaged.
• Cycle power to the drive. Check if the fault reoccurs.
• Replace the drive if the fault continues to occur.
LED Operator Display Fault Name
Uv3
Undervoltage 3 (Inrush Prevention Circuit Fault)
The inrush prevention circuit has failed.
Cause Possible Solution
The contactor on the inrush prevention
circuit is damaged.
• Cycle power to the drive. Check if the fault reoccurs.
• Replace the drive if the fault continues to occur.
• Check monitor U4-06 for the performance life of the inrush prevention circuit.
• Replace the drive if U4-06 exceeds 90%.
<1> This fault is valid from software version 6000 or later.