TOPVERT L1 Series
E-
28
Over-voltage on DC-Bus
during deceleration
(oUd) {37}
The drive detects that the DC
bus voltage has exceeded its
maximum allowable value
while in deceleration.
115/230 V class: about 400V
460 V class: about 800V
Check whether the input voltage falls within the rated
drive input voltage range.
If DC Bus over-voltage due to regenerative voltage,
please increase the Deceleration time or add an
brake unit and brake resistor (optional)
Check whether the required braking power is within
the specified limits.
Ground fault (GF) {03}:
When (one of) the output
terminal(s) is grounded, short
circuit current is more than
50% of drive rated current,
the drive power module may
be damaged.
NOTE: The Ground fault
protection is provided for
drive protection, not for
protection of the user..
Check the wiring connections between the driver and
motor for possible short circuits, also to ground
Check whether the IGBT power module is damaged.
Check for possible poor insulation at the output line
Wait for 15 seconds then execute RESET action to
reactivate the operation.
IGBT fault (SC) {04}
Short-circuit is detected
between upper bridge and
lower bridge of the IGBT
module.
Check whether the motor’s resistance and insulation
are functioning right
Check whether the connection to the motor is short
circuited
Return to the factory if the previous checking is
normal
Wait for 15 seconds then execute RESET action to
reactivate the operation.
Drive overload (OL) {05}
The drive detects excessive
drive output current.
The drive can withstand up to
150 % of the rated current for
a maximum of 60 seconds.
Check whether the motor is overloaded
Reduce torque compensation setting as set in Pr5-01
Increase the acceleration time
Replace the drive with the next higher power model
Motor overload
-Thermal relay 1
(oL1) {06}
(Electronic thermal relay 1
protection.)
Check whether the motor 1 V/F setting proper
Check whether the motor 1 running low speed for
long period
Check for possible motor 1 overload
Check motor 1 full load current (Pr5-00)
Check electronic thermal overload 1 setting (Pr5-18
to Pr5-19)
Reduce the load so that the drive output current does
not exceed the value set on Pr5-00
Increase motor capacity
Over-Torque1 detected
(ot1) {07}
Check whether the motor 1 is overloaded
Check whether motor 1 rated current setting (Pr5-00)
is suitable
Check whether the Over-Torque1 detect parameter
are suitable (Pr5-15~Pr5-17)
Check whether the mechanical system is normal
Increase motor 1 capacity and replace the drive with
the next higher power model
Summary of Contents for TOPVERT L1 Series
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