Yaskawa CIMR-PU2A0081 [296/548] Phone 800 94 412 fax 888 23 773 web www clrwtr com email info clrwtr com

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Yaskawa CIMR-PU2A0008 [296/548] Phone 800 94 412 fax 888 23 773 web www clrwtr com email info clrwtr com
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 main circuit capacitors are 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 a Yaskawa representative.
The relay or contactor on the soft-charge
bypass circuit is damaged
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.
Digital Operator Display Fault Name
Uv2
Control Power Supply Voltage Fault
Voltage is too low for the control drive input power.
Cause Possible Solution
In drive models 2A0004 to 2A0056 or 4A0002
to 4A0031, L2-02 was changed from its
default value without installing a Momentary
Power Loss Ride-Thru unit
Correct the setting to L2-02 or install an optional Momentary Power Loss Ride-Thru unit.
Control power supply wiring is damaged
Cycle power to the drive. Check if the fault reoccurs.
If the problem continues, replace the control board, the entire drive, or the control power supply. For
instructions on replacing the control board, contact Yaskawa or a Yaskawa representative.
Internal circuitry is damaged
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.
Digital Operator Display Fault Name
Uv3
Undervoltage 3 (Soft-Charge Bypass Circuit Fault)
The soft-charge bypass circuit failed.
Cause Possible Solution
The relay or contactor on the soft-charge
bypass circuit is damaged
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.
Digital Operator Display Fault Name
voF
Output Voltage Detection Fault
Problem detected with the voltage on the output side of the drive.
Cause Possible Solution
Hardware is damaged. Internal drive module
MC / FAN overheat protection circuit board
is
due to abnormal ambient operating power.
Lower ambient temperature.
Replace the control board or the entire drive. For instructions on replacing the control board, contact
Yaskawa or a Yaskawa representative.
Digital Operator Display Fault Name
vToL VT Overload
Cause Possible Solution
The output current of the drive has been
elevated for a set length of time.
The application may not be suited for the drive
The application may not be suited for the drive
The drive is undersized for the load
6.4 Fault Detection
296
YASKAWA SIEP YAIP1U 01A AC Drive - P1000 Technical Manual
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.clrwtr.com - Email: info@clrwtr.com

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