WEG MVW3000 Programming Manual page 192

DIAGNOSTICS AND TROUBLESHOOTING
Fault/alarm
F0750
Cell V7 DC link overvoltage
F0751
Cell V7 DC link undervoltage
A0752
Overtemperature on cell V7 IGBT
module
F0753
Overtemperature on cell V7 IGBT
module
F0754
Defective temperature sensor or
undertemperature on cell V7 IGBT
6
F0755
Cell V7 phase IGBT
F0756
Cell V7 neutral IGBT
F0758
Cell V7 phase pulse feedback
F0760
Cell V7 neutral pulse feedback
MVW3000 | 6-36
Reset
Power-on.
O
Manual ( /RESET key).
Auto-reset.
DIx.
Networks.
Power-on.
O
Manual ( /RESET key).
Auto-reset.
DIx.
Networks.
Automatically eliminated when the temper-
ature at the cell heatsink presents a value
below 80 °C.
Power-on.
O
Manual ( /RESET key).
Auto-reset.
DIx.
Networks.
Contact WEG Technical Assistance.
Contact WEG Technical Assistance.
Contact WEG Technical Assistance.
Contact WEG Technical Assistance.
Contact WEG Technical Assistance.
Possible causes
Inverter input supply voltage too high.
Incorrect setting of the inverter main trans-
former taps.
Cell DC link voltage above 1200 V.
Load inertia too high or deceleration ramp
too low.
Setting of P0151 too high.
Inverter input supply voltage too low.
Incorrect setting of the inverter main trans-
former taps.
Cell DC link voltage below 745 V.
Temperature on the cell heatsink above
85 °C.
Ambient temperature too high (> 40 °C) and
high output current.
Fans locked or defective.
Air input filters blocked.
Temperature on the cell heatsink above
90 °C.
Ambient temperature too high (> 40 °C) and
high output current.
Fans locked or defective.
Air input filters blocked.
Cell temperature measurement sensor de-
fective.
Cell temperature sensor disconnected.
Temperature on the cell heatsink below
-10 °C.
Short circuit at the inverter output.
Trigger board of the IGBTs of the cell phase
arm disconnected.
IGBTs of the cell phase arm operating out of
the saturation region.
IGBTs or trigger board of the cell phase arm
defective.
Fault on the desaturation signal feedback or
gate-driver supply.
Short circuit at the inverter output.
Trigger board of the IGBTs of the cell neutral
arm disconnected.
IGBTs of the cell neutral arm operating out
of the saturation region.
IGBTs or trigger board of the cell neutral arm
defective.
Fault on the desaturation signal feedback or
gate-driver supply.
Fault on the commutation of the IGBTs of
the cell phase arm.
Measurement circuit of the confirmation sig-
nal of the commutation of the IGBTs of the
phase arm disconnected or defective.
IGBTs or trigger board of the cell phase arm
defective.
Fault on the confirmation of the commuta-
tion of the IGBTs of the cell neutral arm.
Measurement circuit of the confirmation sig-
nal of the commutation of the IGBTs of the
neutral arm disconnected or defective.
IGBTs or trigger board of teh cell neutral arm
defective.