Yaskawa YASNAC PC NC Maintenance Manual Manuale Utente Scaricare il pdf (Pagina 173)

PC NC Maintenance Manual The VS-626M5

4-152

Table 4.37: Fault Diagnosis and Inverter Corrective Actions

Fault Number Name Contents Corrective Action Fault Code

Overcurrent Output current exceeded

overcurrent detection value, or

inverter output (load) was

short-circuited.

Check for loose wires. _œ_œ_œ_œ

Ground fault Inverter output side ground

current exceeded grounding

detection level.

Check the motor for deteriora-

tion of insulation.

Check the wiring between

inverter and motor.

_œ_œ_œ_œ

Main circuit fuse

blown

DC circuit fuse was blown. Check for damage to transistor,

short-circuits on load side,

ground fault, etc.

Check the inverter output wir-

ing.

_œ_œ_œ_œ

Inverter output

overload

Output current of 120% of 30-

minute rating runs for over

one minute.

Reduce the load.

Check the load shaft (inverter,

servo) capacity.

_œ_œ_œ_œ

Motor overload Motor overload capacity

exceeded.

Reduce the load. _œ_œ_œ_œ

Converter fault A fault occurred in the con-

verter unit.

Check fault contents by using

converter LED.

_œ_œ_œ_›

Main circuit over-

voltage

Main circuit DC bus voltage

exceeded the overvoltage set

value.

Check the input supply voltage.

Check the load shaft (inverter,

servo) capacity.

Check the control constants.

_œ_œ_œ_›

Main circuit under-

voltage

Main circuit DC bus voltage

became lower than undervolt-

age detection level during run.

Check the input supply voltage. _œ_œ_œ_›

Control circuit und-

ervoltage

Control circuit power supply

became lower than undervolt-

age detection level.

Check the control supply volt-

age.

_œ_œ_œ_›

Winding selection

fault

Winding selection was not

completed within set time.

Check the control constant C1-

25.

Check magnetic contactor wir-

ing for winding selection.

_œ_œ_›_œ

Emergency stop

fault

Inverter did not stop within 10

seconds after emergency stop

command.

Check control constant C1-25.

Check the setting of control con-

stant C1-24 and whether exter-

nal torque limit signals TLL and

TLH are input.

_œ_œ_›_œ

Encoder signal

cable disconnec-

tion

Motor encoder signal was dis-

connected or connected

improperly.

Check the wiring of encoder sig-

nal lines.

_œ_œ_›_›

Motor overspeed Motor speed exceeded 120%

of set rated speed.

Check that encoder signal lines

are separated from main circuit

or other power lines.

Check the control constants.

_œ_œ_›_›

1 2 ... 168 169 170 171 172 173 174 175 176 177 178 ... 300 301

Commenti su questo manuale

Nessun commento

Yaskawa YASNAC PC NC Maintenance Manual Manuale Utente Pagina 173

Commenti su questo manuale

Prodotti e manuali riguardandi Apparecchiature Yaskawa YASNAC PC NC Maintenance Manual