10. Troubleshooting and Maintenance
10-2
Protective
function
Keypad
display
Type
Description
IGBT Short
Arm Short
Arm Short-DB
Latch
Inverter output is stopped when IGBT Arm short or output short occurs.
(Arm Short-DB is only come under SV110~220iV5)
Fuse Open
Fuse Open
Latch
The inverter turns off its output by opening the fuse when something is wrong
with the main circuit IGBT to protect the wiring from being damaged from short
currents
Encoder Error
Encoder Err
Latch
1)
Displayed when Encoder signal fault occurs.(H/W)
2)
Displayed when there is a discord of detection time standard of motor error
of PAR-14.(S/W)
BX protection
(Instant Cut
Off)
BX
Latch
Used for the emergency stop of the inverter. The inverter instantly turns off the
output when the BX terminal is turned ON, and returns to regular operation when
the BX terminal is turned OFF. Take caution when using this function.
Motor
overspeed
Over Speed
Latch Displayed when motor rotates over 120% its rated speed.
Communication
Error
COM Error
CPU Error
Latch This fault is displayed when the inverter cannot communicate with the keypad.
H/W Error
HW
–
Diag
Latch
Displayed when CPU has a problem, and then the inverter blocks the IGBT gating
signals.
FAN Lock
*1)
FAN Lock
Latch The inverter turns off its output when there is an Fan Lock.
Encoder
PowerError
*1)
Enc Power
Latch When there is an error in Encoder power source, the inverter turns off its output.
Input
Phase-open
Input PO
Latch
It turns off the inverter output when the power from a phase among 3 phase
’
s
input is discontinued at the state of normal load.
Output
Phase-open
Output PO
Latch It turns off the inverter output from a detecting no-output current.
AC FAN and M/C
Poower
Error
FAN/
MC PWR
Latch
The inverter turns off its output to prevent from damage when AC220V is not
supplied to AC FAN and M/C. (30 ~ 160 kW)
AC FAN
Power
Error
FAN PWR
Latch
The inverter turns off its output to prevent from damage when AC220V is not
supplied to AC FAN and M/C.
*1) It only comes under SV2800~3750iV5.
10.2 Monitoring Fault Condition
10.2.1 Monitoring fault display
Code
LCD display
Description
DIS_05
OC-U
Current fault displayed. (U-phase overcurrent)
Check the current fault display before pressing reset key. pressing [PROG] key and [
▲
(Up)],[
▼
(Down)]
shows operating status at the time of the fault such as output frequency, current, voltage, F/B value, torque
current reference/actual value, dc link voltage, input/output terminal status, operating status and run time)
and the fault contents. Press [ENT] key to exit. Pressing [RESET] key will store the value in DIS_05 [Last
Fault1].
Содержание LSLV-iV5 Series
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