NTC Open Latch
Displayed when an error is detected in the temperature sensor of the
Insulated Gate Bipolar Transistor (IGBT).
Fan Trip Latch
Displayed when an error is detected in the cooling fan. Set PRT-79 to 0 to
activate fan trip (for models below 22 kW capacity).
Pre-PID Fail Latch
Displayed when pre-PID is operating with functions set at APP-34–APP-36. A
fault trip occurs when a controlled variable (PID feedback) is measured
below the set value and the low feedback continues, as it is treated as a load
Ext-Brake Latch
Operates when the external brake signal is provided by the multi-function
terminal. Occurs when the inverter output starting current remains below
the set value at ADV-41. Set either OUT31 or OUT32 to 35 (BR Control).
Err
Latch Displayed when at least one of the two safety input signals is off.
Protection Functions for Communication Options
Lost
Command
Level
Displayed when a frequency or operation command error is detected during
inverter operation by controllers other than the keypad (e.g., using a
terminal block and a communication mode). Activate by setting PRT-12 to
IO Board Trip Latch
Displayed when the I/O board or external communication card is not
connected to the inverter or there is a bad connection.
Latch
Displayed when communication fails during parameter writing. Occurs
when using an LCD keypad due to a control cable fault or a bad connection.
Option Trip-1 Latch
Displayed when a communication error is detected between the inverter
and the communication board. Occurs when the communication option
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