YASKAWA VARISPEED-656RC5

58
Fault Display
Meaning Probable Causes Corrective Actions
OC
Over Current
Ovecurrent
The output current of the power
regenerative unit exceeded the
overcurrent detection level.
(200 % of rated current)
S A short-circuit occurred at the
power regenerative output.
S Power supply drop
S Faulty wiring
Reset the fault after correcting its
cause.
SC
Short Circuit
IGBT Short-circuit
The IGBT gate signal was short-
circuited.
A short-circuit of the PWM sig-
nal occurred.
Replace the control card.
OV
Dc Bus Overvolt
Main Circuit Overvoltage
The main circuit DC voltage ex-
ceeded the overvoltage detec-
tion level.
The deceleration time is too
short and the regenerative ener-
gy from the motor is too large.
S Increase the deceleration time.
S Check the capacity of the pow-
er regenerative unit.
(Increase the capacity.)
Dc
Bus
Overvolt
tion
level.
200 V class : Approx. 400 VDC
400 V class : Approx. 800 VDC
The power supply voltage is too
high.
Decrease the voltage so it is
within specifications.
OH
Heatsink Overheating
The tem
p
erature of the
p
ower
The ambient temperature is too
high.
Install a cooling unit.
OH
Heatsink
Overtmp
The
temperature
of
the
power
regenerative unit’s cooling fins
exceeded
the
setting
in
L8 02
There is a heat source nearby. Remove the heat source.
H
eats
i
n
k
O
vertmp
excee
d
e
d
t
h
e sett
i
ng
i
n L8-02.
(Stopping method can be
changed by L8-03.)
The cooling fan of the power re-
generative unit has stopped.
Replace the cooling fan. (Con-
tact our sales representative.)
OH1
Heatsink Overheating
The tem
p
erature of the
p
ower
The ambient temperature is too
high.
Install a cooling unit.
OH1
Heatsink
Max
temp
The
temperature
of
the
power
regenerative unit’s cooling fins
exceeded
105
_
C
There is a heat source nearby. Remove the heat source.
H
eats
i
n
k
M
ax temp
excee
d
e
d
10
5
_
C.
(Stopping method : Coast to
stop)
The cooling fan of the power re-
generative unit has stopped.
Replace the cooling fan. (Con-
tact our sales representative.)
OL
Input Over Loaded
Power Regenerative Unit In-
put Overload
Power regenerative unit input
exceeded the overload capacity.
The load is too heavy. Check the size of the load.
EF3
External Fault 3
External fault
(terminal S3-SC)
An external fault was in
p
ut from
S Reset external fault inputs to
the multi-function inputs.
EF4
External Fault 4
External fault
(terminal S4-SC)
An
external
fault
was
input
from
a multi-function input.
the
multi function
inputs.
S Remove the cause of the exter-
nal fault.
OPR
Oper Disconnect
Operator Connectin Fault
The Operator was disconnected
during operation started by a run
command from the Operator.
− Check the Operator connection.
ERR
EEPROM R/W Err
EEPROM Write Error
−
A verification error occurred
when writing EEPROM.
S Try turning the power supply
off and on again.
S Try setting the constants again.
CPF00
COM-ERR
(OP&CONV)
Control Circuit Error 1
(Operator Communications
Error)
S Communications with the dig-
ital operator were not estab-
lished within 5 seconds after
the power was turned on.
S MPU peripheral element
check fault.
S Disconnect the digital opera-
tor and then connect it again.
S Check the wiring of the control
circuit power supply.
S Replace the control card.
CPF01
COM-ERR
(OP&CONV)
Control Circuit Error 2
(Operator Communications
Error)
S After communications were
established, there was a trans-
mission error with the digital
operator for more than 2 se-
conds.
S MPU peripheral element
check fault
S Disconnect the digital opera-
tor and then connect it again.
S Check the wiring of the control
circuit power supply.
S Replace the control card.
CPF02
BB Circuit Err
Baseblock Circuit Error
CPF03
EEPROM Err
EEPROM Error
The control circuit is damaged. Replace the control card.
CPF04
Internal A/D Err
CPU Internal A/D Converter
Error