YASKAWA FSDrive-MV1000 - Page 137

5.5 Alarm Detection
YASKAWA ELECTRIC EZZ010928 FSDrive-MV1000 Instructions 137
Troubleshooting
5
Digital Operator Display Minor Fault Name
SE
MEMOBUS/Modbus Communication Test Mode Error
A digital input set to 67H (MEMOBUS/Modbus test) was closed while the drive was
running.
Cause Possible Solutions
Minor Fault
Output
H2-=10
A digital input set to 67H (MEMOBUS/
Modbus test) was closed while the drive was
running.
⇒Stop the drive and run the test again. Yes
Digital Operator Display Minor Fault Name
TMA1
Transformer Temperature Fault
The temperature of the transformer has increased and has exceeded the protection level set
to L8-87.
Cause Possible Solution
Minor Fault
Output
H2-=10
Cooling fan fault ⇒If the cooling airflow is inadequate, replace the cooling fan.
Yes
The intake filter is soiled. ⇒If the intake filter is soiled, clean it.
Parameter setting error ⇒Check the parameter settings.
Thermistor fault and disconnected signal line
⇒If the problem occurs even at a low temperature, for example
immediately after switching on the power, contact Yaskawa or your
nearest sales representative.
Digital Operator Display Minor Fault Name
UL3
Undertorque Detection 1
Drive output current (or torque in OLV, CLV, AOLV/PM, CLV/PM) less than L6-02 for
longer than L6-03 time.
Cause Possible Solutions
Minor Fault
Output
H2-=10
Inappropriate parameter settings. ⇒Check parameters L6-02 and L6-03.
Yes
Fault on the machine side.
Example: If there is undertorque, the pulley
belt may be broken.
Check the status of the machine.
⇒Remove the cause of the fault.
Digital Operator Display Minor Fault Name
UL4
Undertorque Detection 2
Drive output current (or torque in OLV, CLV, AOLV/PM, CLV/PM) less than L6-05 for
longer than L6-06 time.
Cause Possible Solutions
Minor Fault
Output
H2-=10
Inappropriate parameter settings. ⇒Check parameters L6-05 and L6-06.
Yes
Fault on the machine side.
Example: If there is undertorque, the pulley
belt may be broken.
Check the status of the machine.
⇒Remove the cause of the fault.
Digital Operator Display Minor Fault Name
UL5
Mechanical Weakening Detection 2
The operation conditions matched the conditions set to L6-08.
Cause Possible Solutions
Minor Fault
Output
H2-=10
Undertorque was detected and matched the
conditions for mechanical loss detection set to
L6-08.
Check the load side for any problems. Yes