Yaskawa CIMR-UU4A0240A [350/644] Fault detection

Yaskawa CIMR-UU2A0248F [350/644] Fault detection
Digital Operator Display Fault Name
UL4
Undertorque Detection 2
The current has fallen below the minimum value set for Torque Detection Level 2 (L6-05) for longer than
the allowable time (L6-06).
Cause Possible Solution
Parameter settings are not appropriate for the
load
Check L6-05 and L6-06 settings
There is a fault on the machine side Check the load for any problems.
Digital Operator Display Fault Name
UL5
Mechanical Weakening Detection 2
The operation conditions matched the conditions set to L6-08.
Cause Possible Solution
Undertorque was detected and matched the
conditions for mechanical
loss detection set to
L6-08
Check the load side for any problems.
Digital Operator Display Fault Name
Uv1
Control Circuit Undervoltage Fault
Voltage in the control circuit fell below the detection level:
For 200 V class drives: approximately 175 V
For 400 V class drives: approximately 350 V
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 Main Circuit
Wire Gauges and Tightening Torque on page 81 for details.
There is a problem with the voltage from the
drive input power
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.
The power has been interrupted Correct the drive input power.
The capacitors are worn.
Check the maintenance time for the capacitors (U4-05).
Replace the entire drive if U4-05 exceeds 90%. Contact Yaskawa or your nearest sales representative.
The relay or contactor on the soft-charge
bypass circuit is damaged.
Cycle power to the drive.
If the problem continues, replace the entire drive. Contact Yaskawa or your nearest sales representative.
Check monitor U4-06 for the performance life of the soft-charge bypass.
Replace the entire drive if U4-06 exceeds 90%. Contact Yaskawa or your nearest sales representative.
Digital Operator Display Fault Name
Uv2
Control Power Supply Voltage Fault
Voltage is too low for the control drive input power.
Cause Possible Solution
Control power supply wiring is damaged
Cycle power to the drive.
If the problem continues, replace the entire drive or the control power supply.
Internal circuitry is damaged
Cycle power to the drive.
If the problem continues, replace the entire drive. Contact Yaskawa or your nearest sales representative.
Digital Operator Display Fault Name
Uv3
Undervoltage 3 (Soft-Charge Bypass Relay Fault)
The soft-charge bypass relay failed.
Cause Possible Solution
The relay or contactor on the soft-charge
bypass circuit is damaged.
Cycle power to the drive.
If the problem
continues, replace the entire drive. Contact Yaskawa or your nearest sales representative.
Check monitor U4-06 for the performance life of the soft-charge bypass.
Replace the entire drive if U4-06 exceeds 90%. Contact Yaskawa or your nearest sales representative.
6.4 Fault Detection
350
YASKAWA ELECTRIC SIEP C710636 04C U1000 Industrial MATRIX Drive Technical Manual

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