5-6
LED display Description Possible causes Corrective action
External block
bb4
( flash )
External block
External block ( Terminal
S4)
bb5
( flash )
External block
External block ( Terminal
S5)
bb6
( flash )
External block
External block ( Terminal
S6)
bb7
( flash )
External block
External block ( Terminal
S7)
bb8
( flash )
External block
External block ( Terminal
S8)
OS
( flash )
Motor over
speed
Motor over speed :
. Motor speed deviation is
higher than 20-20
(PG over speed level) and
exceeds set time of 20-21
(PG over speed time).
. This fault is valid only in V / F
+PG and SV control mode
(00-00 = 1 or 3 or 4）.
.Speed reference is too high.
.Speed response overshoot or
deficient response occurs.
.Check the speed reference
gain and check 20-20，
20-21settings.
.Adjust ASR setting (group
20 parameter).
PGO
( flash )
PG open circuit
PG open circuit detection:
.When the inverter is
operating, PG pulse is not
detected within the PG open
circuit time (20-26).
.Subject to 20-25(= 0 or 1),
the inverter will be stopped.
. This fault is valid only in V / F
+PG and SV control mode
（00-00 = 1 or 3 or 4）.
.PG wiring error .
.PG power is removed.
.PG is broken off.
.Braking mechanism is
enabled.
.Check the PG wiring.
.Check the PG input power.
DEV
( flash )
speed
deviation
Motor speed deviation:
.Motor speed deviation is
higher than 20-23
(PG speed deviation level)
and exceeds set time of
20-24 (PG deviation time).
.Subject to 20-22(=0 or 1),
the inverter will be stopped.
. This fault detection function
is valid only in V / F +PG and
SV control mode（00-00 = 1
or 3 or 4）.
. The load is too big.
. The load has been locked.
(For example, the braking
mechanism is enabled.).
. PG wiring error.
. PG the parameter setting
（group 20）is incorrect.
. Acceleration/deceleration
time is too short.
. Check mechanical load.
. Check the braking
mechanism is enabled or
not, or reduce the load.
.Check PG connection.
.Verify the the parameter
settings of 20-23 , 20-24
and 20-28are correct or
not.
. Prolong
acceleration/deceleration
To Next Page
Loading...
