Displayed when internal DC circuit voltage exceeds the
specified value.
Displayed when internal DC circuit voltage is less than the
specified value.
Displayed when internal DC circuit voltage is less than the
specified value during inverter operation.
Trip*
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
Displayed based on inverse time-limit thermal
characteristics to prevent motor overheating. Operates
when Pr.40 is set to a value other than 0.
Open
Displayed when a 3-phase inverter output has one or more
phases in an open circuit condition. Operates when bit 1 of
Open
Displayed when a 3-phase inverter input has one or more
phases in an open circuit condition. Operates only when bit
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 150% for 1 min and 200% for 4 sec. Protection is
based on inverter rated capacity, and may vary depending
on the device’s capacity.
Displayed when the motor is not connected during inverter
operation. Operates when Pr.31 is set to 1.
* S100 inverters rated for 4.0kW or less do not support the ground fault trip (GFT) feature.
Therefore, an over current trip (OCT) or over voltage trip (OVT) may occur when there is a low-
resistance ground fault.
Protection Functions Using Abnormal Internal Circuit Conditions and External Signals
Displayed when the tempertature of the inverter heat sink
exceeds the specified value.
Displayed when the DC circuit in the inverter detects a
specified level of excessive, short circuit current.
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
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