7
DIAGNOSTICS AND TROUBLESHOOTING
Fault/alarm
Reset
Possible causes
F1261
Cell W11 electronics power supply
Contact WEG Service Center.
Voltages of the internal electronic circuits of the
cell out of the operation level.
Defect on the cell power supply.
F1266
Cell W11 modulation synchronism
Contact WEG Service Center.
Fault in the synchronism between the MCC1
control board of the cell and the MVC3 main con-
trol.
F1267
Cell W11 bypass system
Contact WEG Service Center.
Fault in the operation of the cell bypass system.
Bypass system is not connected or defective.
F1268
Communication with cell W11
Contact WEG Service Center.
Fault on the communication between the MCC1
control board of the cell and the MVC3 main con-
trol.
Break or defect on the cell communication optic
cable.
F1270
Incompatible cell W11 firmware
Contact WEG Service Center.
Firmware version of the MCC1 control board of
the cell incompatible with the MVC3 main control.
F1271
Incompatible cell W11 model
Contact WEG Service Center.
Cell model incompatible or invalid with the in-
verter model.
F1272
Cell W11 insulation defective
Contact WEG Service Center.
Fault in the internal insulation of the cell: Contact
between some energized point of the circuit and
the frame.
Fault on the capacitor discharge resistors of the
cell DC link.
F1273
Firmware update or PLD cell W11
Contact WEG Service Center.
Fault in the update process of the processor
firmware or in the reconfiguration of the cell PLD.
F1275
Cell W12 DC link overvoltage
Power-on.
Manual (
O
/RESET key).
Auto-reset.
DIx.
Networks.
Inverter input supply voltage too high.
Incorrect setting of the inverter main transformer
taps.
Cell DC link voltage above 1200 V.
Load inertia too high or deceleration ramp too
short.
Setting of P0151 too high.
F1276
Cell W12 DC link undervoltage
Power-on.
Manual (
O
/RESET key).
Auto-reset.
DIx.
Networks.
Inverter input supply voltage too low.
Incorrect setting of the inverter main transformer
taps.
Cell DC link voltage below 745 V below 652 V for
operation in vector control.
A1277
Overtemperature on cell W12 IGBT
module
Automatically eliminated when the tem-
perature at the cell heatsink presents a
value below 80 °C.
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.
F1278
Overtemperature on cell W12 IGBT
module
Power-on.
Manual (
O
/RESET key).
Auto-reset.
DIx.
Networks.
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.
F1279
Defective temperature sensor or
undertemperature on cell W12
IGBT
Contact WEG Service Center.
Cell temperature measurement sensor defective.
Cell temperature sensor disconnected.
Temperature on the cell heatsink below -10 °C.
MVW3000 | 7-64
Summary of Contents for MVW3000 Series
Page 2: ......
Page 58: ...1 QUICK REFERENCE OF PARAMETERS AND FAULTS MVW3000 1 52...
Page 62: ...2 SAFETY INSTRUCTIONS MVW3000 2 4...
Page 192: ...6 SPECIAL FUNCTIONS MVW3000 6 4...
Page 262: ...7 DIAGNOSTICS AND TROUBLESHOOTING MVW3000 7 70...
Page 263: ......
