YASKAWA FSDrive-MV1000 Series Instructions For Use Manual page 160

5.4 Fault Detection
Digital Operator Display
TME2
Cause
Cooling fan fault possibly due to inadequate
cooling airflow
The intake filter is soiled.
Overheated transformer and disconnected signal
line
Digital Operator Display
TME3
Cause
Disconnection of the transformer temperature
sensor cable detected.
Digital Operator Display
UL3
Cause
Parameter settings are not appropriate for the
load.
Fault on the machine side
Example: If there is undertorque, the pulley belt
may be broken.
Digital Operator Display
UL4
Cause
Parameter settings are not appropriate for the
load.
Fault on the machine side
Example: If there is undertorque, the pulley belt
may be broken.
Digital Operator Display
UL5
Cause
Undertorque was detected and matched the
conditions for mechanical loss detection set to
L6-08.
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Transformer Temperature DI Fault
A fault was detected from a contact input terminal (transformer overheat) on the control
board.
If the cooling airflow is inadequate, replace the cooling fan.
Clean the intake filter.
If the problem occurs at a low temperature, for example immediately after applying power,
contact Yaskawa or your nearest sales representative.
Transformer Temperature Sensor Disconnection
Transformer temperature = -30°C or lower for 10 continuous seconds
• Check the transformer temperature sensor cable.
• Fix the disconnection.
Undertorque Detection 1
The current has fallen below the minimum value set for torque detection (L6-02) for longer than
the allowable time (L6-03).
Check the settings of parameters L6-02 and L6-03.
Check the status of the machine.
Remove the cause of the fault.
Undertorque Detection 2
The current has fallen below the minimum value set for torque detection (L6-05) for longer than
the allowable time (L6-06).
Check the settings of parameters L6-05 and L6-06.
Check the load for any problems.
Remove the cause of the fault.
Mechanical Weakening Detection 2
The operation conditions matched the conditions set to L6-08.
Check the load side for any problems.
YASKAWA ELECTRIC TOEP C710687 02B FSDrive-MV1000 Instructions
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