132 Chapter 9 - Troubleshooting
User Manual
Table 9.3.1 Alarm List Event
Code
LCD display
EF
EF Ext Fault
It trips when External fault input is active
YES
OC
OC OverCurrent
It trips when an Overcurrent value is detected by output current sensor
YES
Ou
OV OverVoltage
It trips when the drive DC Bus voltage is higher than the maximun threshold for the given main
voltage setting
YES
Uu
UV UnderVoltage
It trips when the drive DC Bus voltage is lower than the maximun threshold for the given main
voltage setting
YES
OH
OH OverTemperat
It trips when the drive heatsink temperature detected by the
switch
sensor exceeds its
threshold
NO
OLi
OLi Drive OL
It trips when the drive overload accumulator exceeded the trip threshold
NO
OLM
OLM Motor OL
It trips when the drive overload accumulator exceeded the trip threshold
NO
OLr
OLr Brake res OL
It trips when the motor overload accumulator exceeded the trip threshold
NO
Ot
Ot Inst OverTrq
It trips when the torque delivered by the motor exceeds the programmed level for the preset
time
NO
PH
PH Phase loss
It trips when the supply phase lack: enabled 30 seconds after one of the supply phases has
been disconnected
NO
FU
FU Fuse Blown
It trips when the in case of inner fuse breakage (fuses on the drive inputs)
NO
OCH
OCH Desat Alarm
IGBT desaturation or instantaneous overcurrent have been detected
YES
St
St Serial TO
It trips when the serial link time out exceeds the programmed level
YES
OP1
OP1 Opt 1 Alm
Communication failure between drive regulation board and option 1 expantion board
NO
OP1
OP2 Opt 2 Alm
Communication failure between drive regulation board and option 2 expantion board
NO
bF
bF Bus Fault
Drive comunication Bus failure
NO
OHS
OHS OverTemperat
It trips when the drive heatsink temperature detected by the
analog
sensor exceeds its
threshold; only for: 4220 and higher (230V…480V) - 4025 and higher (575V)
NO
Lf
Limiter fault
It trips when drive is a limit state caused by the output current or the DC link voltage.
It
can be origin by wrong settings of regulator gains or by the motor load.
NO
SHC
SHC Short Circ
Short Circuit between output phases or Ground fault
NO
tgy0330
ALARM
DESCRIPTION
AUTORESET
N
OTE
!
OH switch sensor threshold and OHS analog sensor threshold are depending by the drive size
(75 °C ... 85 °C)