Causes and corrective actions
135
4
Warning
Output is not shut off when a protective function is activated.
Converter indication
LB
PU indication
OL
Name
Overload signal detection
Description
Appears when the current limit function of the converter is activated.
Check point
• Check that the acceleration/deceleration time set in the inverter is not too short.
• Check that the load is not too heavy.
• Check for any failures in peripheral devices.
Corrective action
• Set the acceleration/deceleration time longer in the inverter.
• Reduce the load.
• Check that the peripheral devices are operating properly.
Converter indication
LC
PU indication
TH
Name
Electronic thermal relay function pre-alarm
Description
Appears if the cumulative value of the electronic thermal relay reaches or exceeds 85% of the preset level. If
the cumulative value reaches or exceeds the specified value, the protection circuit is activated to stop the
outputs of the multifunction regeneration converter.
The THP signal can be simultaneously output with the indication "TH" displayed. For the terminal used for the
THP signal output, set "8 (positive logic)" or "108 (negative logic)" in any of
Pr.11, Pr.12, and Pr.16 (Output
terminal function selection)
to assign the function. (Refer to
.)
Check point
Check for large load or sudden acceleration.
Corrective action
Reduce the load and frequency of operation.
Converter indication
LD
PU indication
PS
Name
PU stop
Description
The PU stop (stop of the converter operation by pressing
on the PU) is enabled by the setting of
Pr.75
Reset selection / disconnected PU detection / PU stop selection
. (For the details of
Pr.75
Check point
Check for a stop made by pressing
on the PU.
Corrective action
To reset the indication, turn ON the Converter stop (SOF) signal to stop the converter output, and press
.
Converter indication
LE
PU indication
MT
Name
Maintenance signal output
Description
Appears when the converter's cumulative energization time reaches or exceeds the parameter set value.
This warning is not activated when
Pr.35 Maintenance timer warning output set time
is in the initial setting
(
Pr.35
= "9999").
Check point
Check that the value of
Pr.34 Maintenance timer
is larger than that of
Pr.35 Maintenance timer warning
output set time
. (Refer to
Corrective action
Write "0" in
Pr.34 Maintenance timer
.
Converter indication
LG
PU indication
SL
Name
Power supply not detected
Description
Appears when the power supply detection ends incompletely at a power failure.
Appears at the power ON of the control circuit when using separate power supply sources for the control
circuit power supply and for the main circuit power supply. It is not a fault.
Check point
Check that the wiring from proper power source is performed correctly.
Check that the wiring is performed correctly so that the power source can be detected.
Corrective action
Correct the wiring.
Summary of Contents for FR-XC-11K
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