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11. Troubleshooting
11. Troubleshooting
11. Troubleshooting
11. Troubleshooting
Problem
Inspection item
Inspection result
Countermeasure
The LCD display
shows nothing.
Wiring of the operational
power supply
(Between terminals 11 and 12)
No wiring installed.
Install the wiring
properly.
Operational power supply
voltage
(Between terminals 11 and 12)
Less than 90 VAC
Provide voltage of 90 to
250 VAC.
90 to 250 VAC
Replace or repair Shock
Monitor.
The LCD display is
illegible.
Adjust the contrast (Refer to
page 9.).
The display becomes dark. Re-adjust the contrast.
The display does not
improve.
Replace or repair Shock
Monitor.
Output is activated
immediately after
Shock Monitor
starts.
In the Program mode,
check the setting value of
4:Start Time .
Short
Set a little longer value.
Long (It is clear that the
output is activated within
the setting value.)
Replace or repair Shock
Monitor.
Even when a long
value is set to
4:Start Time (20
seconds max.), the
relay is activated as
soon as the time is
up.
Startup time of the motor
Acceleration time of the
inverter
Longer than 20 seconds
Review the motor
capacity.
Set a shorter acceleration
time.
In the Monitor mode, check
the load ratio and setting level
at startup.
The setting value is small. Set a larger value in the
Program mode.
Wrong detection level is
selected.
Check the process
switching input.
The load ratio is
shown as 0%.
Is the current sensor and main
unit connected?
The sensor cable is
disconnected.
Connect the cable
properly.
Does the V-phase motor wire
pass through the current
sensor?
･
No wire passes through
the sensor.
･
Other phase
Install the wiring
properly.
Check the wiring of the
voltage input U, V, W
(Terminals 1, 2, 3).
･
No wiring installed or
wiring is disconnected.
・
Incorrect wiring
Install the wiring
properly.
Although the motor
starts, the displayed
load ratio is wrong
with respect to the
actual load.
Model number of the current
sensor
Wrong
Replace with a correct
sensor.
Does the V-phase motor wire
pass through the current sensor?
Other phase
(U-phase or W-phase)
Install the wiring
properly.
Is the No. of times to pass the
wire through the sensor correct?
Wrong
Check the wiring of the
voltage input U, V, W
(Terminals 1, 2, 3).
･
No wiring installed or
wiring is disconnected.
・
Incorrect wiring
Install the wiring
properly.
In the Monitor mode, check
that the correct motor has
been selected.
The selection does not
correspond with the actual
motor.
Set the parameters (2
and 3) properly.
Start the motor, change the
display screen, and check the
voltage and current values.
The load ratio far deviate
from the displayed current
value.
Repair Shock Monitor.
Replace Shock Monitor.
The displayed load
ratio is negative.
Is the motor operation status
negative torque?
Rapid deceleration is
caused by inverter
operation.
If the actual torque is
negative, the display is
not abnormal.
The operation is affected
by load.
If the actual torque is
negative, the display is
not abnormal.
Check the wiring of the
voltage input U, V, W
(Terminals 1, 2, 3).
･
No wiring installed or
wiring is disconnected.
・
Incorrect wiring
Install the wiring
properly.
Does the motor wire pass
through the current sensor in
the right direction?
(Does the direction match with
the arrow on the top of the
current sensor?)
Opposite direction
Install the wiring
properly.
The load torque is positive
and the motor wire
correctly passes through
the current sensor.
･
Replace Shock Monitor.
･
Repair Shock Monitor.
Although the load
ratio display is
correct, the relay
output is not
activated.
In the Monitor mode, check
the multi-step selection and
level setting values.
The process switching
selection is incorrect.
(X1, X2, X3)
Set the detection level
selection input properly.
The level setting values are
not set properly.
Set appropriate values.
In the Program mode,
check the Shock Time.
Too long.
Set a shorter value.
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