73
Protection Functions Using Abnormal Internal Circuit Conditions and External
Signals
Fuse Open Latch A failure occurs when the inverter DC fuse
responds to over current only above 30kW.
Over Heat Latch A failure occurs when the temperature of the
inverter cooling fan rises over the prescribed
degree.
Over Current2 Latch A failure occurs when the DC part in the inverter
detects short circuit current.
External Trip Latch This is an external failure signal by function
selection of the multi-function terminal. Of the
IN65~75 functions, No.3 External Trip is
selected.
BX Level The inverter output is blocked by function
selection of the multi-function terminal. Of the
IN65~75 functions, No.4 BX is selected.
H/W-Diag Fatal Trouble with the memory device within the
inverter (EPP ROM), analog-digital switch
output (ADC Off Set) or CPU malfunction
(Watch Dog-1, Watch Dog-2). - EEP Err : In the
event of problems during Parameter Read/Write
because of KPD EEP ROM damage, etc.
- ADC Off Set : In the event of trouble in the
current sensing area (U/V/W CT etc.)
- Gate Pwr Loss : In the event of trouble in the
power of IGBT Gate of the product 30kW or
higher. (When trouble occurs in 22kW product, it
requires checking the capacity settings of the
product)
NTC Open Latch A failure occurs when abnormality is detected
with the temperature detecting sensor of the
power switch (IGBT).
Fan Trip Latch A failure occurs when abnormality is detected
with the cooling fan. Operation resumes if PRT-
79 is set at 0.
IP54 FAN Trip Latch Detected when IP54 product has a fault of
internal circulationat FAN.
Thermal Trip Latch A failure occurs when resistance goes beyond
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