YASKAWA VS-626M5 Instruction Manual page 191

Table 12.2 Inverter Faults (continued)
Fault No. Name
Motor therm-
Motor temperature detection therm-
istor discon-
istor was disconnected.
nection
Heatsink Heatsink temperature exceeded up-
overheat 1 per limit (minor fault).
Heatsink temperature over upper
Heatsink
limit continued for one minute or
overheat 2
longer.
Thermistor for heatsink temperature
Heatsink
detection was disconnected.
thermistor
The ambient temperature is low
disconnection
(−20°C (−4_F) or below).
Control PCB
Control PCB temperature exceeded
temperature
80°C (176°F) (minor fault).
fault 1
Control PCB
Control PCB temperature exceeded
temperature
85°C (185°F).
fault 2
Internal cool- Inverter internal cooling fan is
ing fan fault stopped.
tuneup
incomplete
Orientation command was input be-
(Encoder
fore tuning up (minor fault).
method
orientation)
Phase-C sig-
Phase-C signal could not be de-
nal detection
tected during tuning up.
error
Phase-C sig-
Phase-C signal width exceeded 100
nal width er-
pulses.
ror
Fault of num-
ber of pulses
per rotation
Number of pulses per rotation ex-
ceeded 4096 ±1 during tuning up.
(Encoder
method
orientation)
Position
Position detection encoder signal
detection sig-
cable was disconnected or con-
nal cable
nected improperly.
disconnection
INC signal er-
ror
INC signal input timing error
(Encoder
(minor fault)
method
orientation)
Contents Corrective Actions
S Check the motor thermistor sig-
nal wiring.
S Check the motor ambient tem-
perature. (Raise the temperature
to above −10°C (14°F) or more.)
Check the ambient temperature Check the ambient temperature
for effective cooling.
S Replace the unit.
S Raise the ambient temperature
to above −20°C (−4°F).
Check the ambient temperature Check the ambient temperature
for effective cooling.
Replace the internal cooling fan.
Perform orientation tuneup.
S Check the wiring of encoder sig-
nal lines. l li
S Confirm that encoder signal
lines are separated from main
circuit or other power lines. circuit or other power lines.
S Verify that motor and Inverter
are grounded.
S Replace the Orientation Card.
S Replace the encoder.
S Check the wiring of load shaft
encoder signal lines.
S Replace the load shaft encoder.
S Replace the Orientation Card.
After carrying out absolute posi-
tioning, change circuit to com-
mand INC signal.
12 - 7
12.3 Inverter Faults
Error Code
FfFF
FfFF
FfFF
FfFF FfFF
FfFF
FffF
g g
FffF FffF
FffF
FffF
12