LED Operator Display
Minor Fault Name
oL3
Overtorque 1
Drive output current was greater than L6-02 for longer than the time set in L6-03.
Cause
Possible Solutions
Minor Fault
Output
(H2-01 = 10)
Inappropriate parameter
settings.
Check parameters L6-02 and L6-03.
YES
There is a fault on the machine
side (e.g., the machine is
locked up).
• Check the status of the machine.
• Remove the cause of the fault.
YES
LED Operator Display
Minor Fault Name
ov
DC Bus Overvoltage
The DC bus voltage exceeded the trip point.
For 200 V class: approximately 410 V
For 400 V class: approximately 820 V (740 V when E1-01 < 400)
Cause
Possible Solutions
Minor Fault
Output
(H2-01 = 10)
Surge voltage present in the
drive input power.
• Install a DC reactor or an AC reactor.
• Voltage surge can result from a thyristor convertor and a phase
advancing capacitor operating on the same drive input power
system.
YES
• The motor is short-
circuited.
• Ground current has
over-charged the main
circuit capacitors via the
drive input power.
• Check the motor power cable, relay terminals and motor
terminal box for short circuits.
• Correct grounding shorts and turn the power back on.
YES
Noise interference causes the
drive to operate incorrectly.
• Review possible solutions for handling noise interference.
• Review section on handling noise interference and check
control circuit lines, main circuit lines and ground wiring.
• If the magnetic contactor is identified as a source of noise,
install a surge protector to the MC coil.
YES
Set number of fault restarts (L5-01) to a value other than 0.
YES
LED Operator Display
Minor Fault Name
PASS
MEMOBUS/Modbus Communication Test Mode Complete
Cause
Possible Solutions
Minor Fault
Output
(H2-01 = 10)
MEMOBUS/Modbus test has
finished normally.
This verifies that the test was successful.
No output
LED Operator Display
Minor Fault Name
SE
MEMOBUS/Modbus Communication Test Mode Error
5.5 Alarm Detection
150
YASKAWA ELECTRIC TOEP C710606 25D YASKAWA AC Drive J1000 Installation & Start-Up Manual
