LSIS LSLV-S100 - Page 175

Learning Advanced Features
161
Problem
Relevant function
code
Troubleshooting
The motor hunts with
regenerative load at low speed
(10Hz or lower), or an “OCT” fault
trip occurs.
Cn.40 PMdeadVolt
Per
Try increasing the value at Cn.40 in 10%
increments.
The motor hunts* or the torque
is not sufficient while the load is
increasing at low speed (10Hz
or lower).
Cn.04 Carrier Freq
Cn.12 ASR P Gain 1
Cn.13 ASR I Gain 1
If the motor hunts at low speeds, try
increasing the value at Cn.13 in 50 msec
increments. If the motor does not hunt, try
increasing the value at Cn.12 in 10%
increments until the motor runs in an
optimal operation condition.
If the motor hunts and the torque is not
sufficient at 5–10Hz speed range, and if the
carrier frequency at Cn.04 is set to more than
3 kHz, try decreasing the value in 1 kHz
decrements.
The motor hunts excessively
during no-load operation when
rated current is supplied to the
motor.
Cn.12 ASR P Gain 1
Cn.13 ASR I Gain 1
Cn.15 ASR P Gain 2
Cn.16 ASR I Gain 2
Try decreasing the speed controller gains at
Cn. 12–16 in 30% decrements.
The value at bA.30 (PM Flux Ref)
becomes “0” after performing an
auto tuning operation by setting
bA. 20 to 7 [All (PM)].
bA.11 Pole Number
bA.15 Rated Volt
dr.18 Base Freq
Refer to the motor’s rating plate and set the
pole number at bA.11 (Pole Number), or
enter a calculated pole number: Pole
Number = (120 x BaseFreq/BaseRPM)
Refer to the motor’s rating plate and set the
rated voltage and base frequency at bA-15
(Rated Volt) and dr.18 (Base Freq), and then
run auto tuning again by setting bA-20 (Auto
Tuning) to 7 [All (PM)].
Fault trips occur after a static auto
tuning.
bA.21 Rs
bA.28 Ld (PM)
bA.29 Lq (PM)
bA.30 PM Flux Ref
Motor operation may fail if a static PM auto
tuning result is not accurate. Refer to the
motor’s rating plate and set the motor-
related parameters again.
“OVT” occurs due to abrupt
acceleration, deceleration, or
massive load change while the
motor is operated at mid-speed
(above 30Hz).
Note2)
Cn.16 ASR I Gain 2
Try decreasing the value at Cn.16 in 5%
decrements.
Speed variation occurs during an
operation at rated motor speed,
or during an overloaded high
speed operation.
Cn.45 PM Flux FF %
Cn.50 V Con HR
Cn.51 V Con Ki
If the motor is operated at the rated speed,
try decreasing the value at Cn.50 in 5%
increments.
If the motor response is slow, try increasing
the value at Cn.51 in 5% increments (or, try