LS ELECTRIC H100 0008-2(PLUS), Manual

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Troubleshooting
167
LCD Display Type Description
rated current.
Over Voltage Latch
Displayed when internal DC circuit voltage exceeds the
specified value.
Low Voltage Level
Displayed when internal DC circuit voltage is less than the
specified value.
Low Voltage2 Latch
Displayed when internal DC circuit voltage is less than the
specified value during inverter operation.
Ground Trip Latch
Displayed when a ground fault trip occurs on the output side of
the inverter and causes the current to exceed the specified
value. The specified value varies depending on inverter
capacity.
E-Thermal Latch
Displayed based on inverse time-limit thermal characteristics to
prevent motor overheating. Operates when PRT-40 is set to a
value other than ‘0’.
Out Phase Open Latch
Displayed when a 3-phase inverter output has one or more
phases in an open circuit condition. Operates when bit 1 of
PRT-
05 is set to ‘1’.
In Phase Open Latch
Displayed when a 3-phase inverter input has one or more
phases in an open circuit condition. Operates only when bit 2
of PRT-
05 is set to ‘1’.
Inverter OLT Latch
Displayed when the inverter has been protected from overload
and resultant overheating, based on inverse time-limit thermal
characteristics. Allowable overload rates for the inverter are
120% for 1 min and 140% for 5 sec.
No Motor Trip Latch
Displayed when the motor is not connected during inverter
operation. Operates when PRT-
31 is set to ‘1’.
Protection Functions Using Abnormal Internal Circuit Conditions and External
Signals
LCD Display Type Description
Over Heat Latch
Displayed when the temperature of the inverter heat sink
exceeds the specified value.
Over Current2 Latch
Displayed when the DC circuit in the inverter detects a
specified level of excessive, short circuit current.
External Trip Latch
Displayed when an external fault signal is provided by the
multi-function terminal. Set one of the multi-function input
terminals at IN-65-
71 to ‘4 (External Trip)’ to enable external