79
overvoltage
detection level
1.200 V class: 410
V
2.400 V class: 820
V( 740 V when d1-
01＜400 )
output short circuit
3. Ground fault in
the output circuit
causes the DC bus
capacitor to
overcharge
4. Electrical signal
interference causes
drive malfunction
2. Check the motor power cable, relay
terminals and motor terminal box
3. Correct grounding shorts and reapply
power
4. Check the solutions for interference
suppression
»Check the control circuit lines, main circuit
lines and grounding wiring.
»If the MC is the source of interference,
connect a suppressor to it.
5. Reconnect the cable
6. Correct the wiring
Undervoltage
1.Voltage in the
DC bus fell below
the undervoltage
detection level
(P2-03)
2.200 V class: 190
V
3.400 V class: 380
V
( 350 V when d1-
01＜400 )
1. Input power
phase loss
2. Loose wiring
terminals of drive
input power
3. Problem with the
voltage from the
drive input power
4. The drive main
circuit capacitors
are weakened.
5. The contactor or
relay on the soft-
charge bypass
circuit is damaged
1. Correct the drive input power wiring
2. Tighten the terminals
3. Check the voltage
a. Adjust the voltage according to the drive
input power specifications
b. Check the main circuit magnetic contactor if
there is no problem with the power supply
4&5. Turn on and turn off the power to see if
any problem occurs
Replace either the entire drive or the control
board if the problem continues to occur.
Contact the local distributor for more
information.
Undertorque
Detection 1
The current has
dropped below
the torque
detection level set
to P6-01 for
longer than the
time set to P6-02
1. Incorrect
parameter settings
2.Malfunction on
machinery side. Ex,
the machinery is
locked up
1. Reset P6-01 and P6-02
2. Ensure there is no problem on the
machinery side.
Baseblock
Drive output
interrupted by an
An external
baseblock signal
was input via one of
the multi-function
Check baseblock signal input timing and
external sequence
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