Hioki TS2400, Instruction Manual, Page: 98 / 116

94
Troubleshooting
Alarm
display
Alarm name Description Cause and solution
A. 100 Overcurrent or heat
sink overheated
An overcurrent flowed
through the IGBT or the
heat sink of the servo pack
was overheated.
• Motor oscillation: There is a problem
with the drive mechanism.
• Motor power line wiring mistake, broken
connection, or short.
• Malfunction caused by noise
interference.
• Servo pack or motor failure
A. 300 Regeneration error Regenerative circuit or
regenerative resistor is
faulty.
• The external regenerative resistor is
not securely wired or is disconnected.
• The servo pack has failed.
A. 320 Regenerative
overload
Regenerative energy
exceeds regenerative
resistor capacity.
• Abnormal supply voltage: Check
whether the supply voltage is
exceeding system specifications.
• Insufficient external regenerative
resistance, regenerative resistor
capacity, or regenerative power has
been continuously flowing back.
• Regenerative power continuously
flowed back because negative load
was continuously applied.
• The servo pack has failed.
A. 330 Main circuit power
supply wiring error
Setting of AC input/DC
input is incorrect.
Power supply wiring is
incorrect.
• The regenerative resistor
disconnected when the servo pack
power supply voltage was high.
• The servo pack has failed.
A. 400 Overvoltage Main circuit DC voltage is
excessively high.
• A 290 V or higher AC power supply
voltage is detected.
• The power supply is unstable, or was
influenced by a lightning surge.
• The servo pack has failed.
A. 410 Undervoltage Main circuit DC voltage is
excessively low.
• The AC power supply voltage is 120 V
or lower.
• The power supply voltage dropped
during operation.
• Occurrence of instantaneous power
interruption.
• The servo pack fuse is blown out.
• The servo pack has failed.
A. 450 Main-circuit capacitor
overvoltage
The capacitor of the main
circuit has deteriorated or
is faulty.
• The servo pack has failed.
A. 510 Overspeed The servomotor speed
is above the maximum
rotational speed.
• The order of phases U, V, and W in
the servomotor wiring is incorrect.
• A reference value exceeding the
overspeed detection level was input.
• The motor speed exceeded the
maximum.
• The servo pack has failed.
A. 511 Overspeed of encoder
output pulse rate
The pulse output speed
upper limit of the set
encoder output pulse
(Pn212) is exceeded.
• Check the setting of the encoder
output pulse as well as the motor
speed. Reduce the motor speed.
• The servo pack has failed.
A. 520 Oscillation alarm Abnormal oscillation was
detected in the motorʼs
rotational speed.
• There is a problem in the drive
mechanism.
• Motor oscillation: Inspect for loose
couplings or belts.