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6-23
Ch
ap. 6
TROUBL
ESHO
O
TING
Possible Causes
What to Check and Suggested Measures
(3) The motor speed does not rise
due to the current limiter
operation.
Check the data of function code F44 (Current limiter (Level)).
Î
Change the F44 data correctly. Or, set the F43 data to "0" (Disable) if the current
limiter operation is not needed.
Check the data of function codes F04*, F05*, and P01* through P12* to ensure that the
V/f pattern setting is right.
Î
Match the V/f pattern setting with the motor ratings.
Î
Change the function code data in accordance with the motor parameters.
(4) Function code settings do not
match the motor
characteristics.
Check whether the data of P01*, P02*, P03*, P06*, P07*, P08*, P09*, P10* and P12*
match the parameters of the motor.
Î
Perform auto-tuning of the inverter, using the function code P04*.
(5) Wrong wiring between the
pulse generator (PG) and the
inverter.
Check the wiring between the PG and the inverter.
Î
Correct the wiring.
Check that the relationships between the PG feedback signal and the run command are as
follows:
•
For the FWD command: the B phase pulse is in the High level at rising edge of the A
phase pulse
•
For the REV command: the B phase pulse is in the Low level at rising edge of the A
phase pulse
Î
If the relationship is wrong, interchange the A and B phase wires.
(6) Wiring to the motor is
incorrect.
Check the wiring to the motor.
Î
Connect the inverter output terminals U, V, and W to the motor input terminals U, V,
and W, respectively.
(7) The motor speed does not rise
due to the torque limiter
operation.
Check the data of F40 (Torque limiter 1-1).
Î
Correct the F40 data. Or, set the F40 data to "999" (Disable) if the torque limiter
operation is not needed.
[ 29 ]
nrb
NTC wire break error
Problem A wire break is found in the NTC thermistor detection circuit.
Possible Causes
What to Check and Suggested Measures
(1) The NTC thermistor cable is
broken.
Check whether the motor cable is broken.
Î
Replace the motor cable.
(2) The
temperature
around
the
motor is extremely low (lower
than -30
°
C (-22
°
F)).
Measure the temperature around the motor.
Î
Reconsider the use environment of the motor.
(3) The NTC thermistor is broken.
Measure the resistance of the NTC thermistor.
Î
Replace the motor.
[ 30 ]
err
Mock alarm
Problem The LED displays the alarm
err
.
Possible Causes
What to Check and Suggested Measures
(1) The +
keys were held
down for more than 5 seconds.
Î
To escape from this alarm state, press the
key.
Содержание FRENIC-MEGA
Страница 36: ...2 6 Unit inch mm Refer to Section 2 3 3 9...
Страница 208: ...5 89 Examples of Sequence Circuits 1 Standard sequence 2 Sequence with an emergency switching function...
Страница 356: ...MEMO...
Страница 358: ...Fuji Electric Co Ltd Fuji Electric Corp of America http www fujielectric com fecoa 2011 04 D11 D10...