Fuji Electric FRENIC-AQUA series, User Manual

Page: 690 / 751

9.4 Nothing appears on the monitor
9-25
Chap. 9
TROUBL
ESH
OOTING
[ 2 ] The motor rotates, but the speed does not increase.
Possible Causes What to Check and Suggested Measures
(1) The maximum frequency
currently specified was too
low.
Check the data of function code F03 (Maximum frequency).
Î Correct the F03 data.
(2) The data of frequency limiter
(High) currently specified was
too low.
Check the data of function code F15 (Frequency limiter (High)).
Î
Correct the F15 data.
(3) The reference frequency
currently specified was too
low.
Check that the reference frequency has been entered correctly, using
Menu #4 "I/O Checking" on the keypad.
Î Increase the reference frequency.
Î Inspect the external frequency command potentiometers, signal
converters, switches, and relay contacts. Replace any ones that are
faulty.
Î Connect the external circuit wires to terminals [13], [12], [11], [C1],
and [V2] correctly.
(4) A frequency command (e.g.,
multi-frequency or via
communications) with higher
priority than the one
attempted was active and its
reference frequency was too
low.
Check the data of the relevant function codes and what frequency
commands are being received, through Menu "Data Setting," Menu
"Data Checking" and Menu "I/O Checking," on the keypad by referring
to the block diagram of the frequency command (refer to Chapter 7).
Î Correct any incorrect data of function codes (e.g. cancel the higher
priority frequency command).
(5) The acceleration time was too
long or too short.
Check the data of function codes F07, E10, E12, and E14 (Acceleration
time).
Î Change the acceleration time to match the load.
Measure the output current.
Î Reduce the load.
(6) Overload.
Check whether any mechanical brake is activated.
Î Release the mechanical brake.
(7) Function code settings do not
agree with the motor
characteristics.
If auto-torque boost or auto-energy saving operation is specified, check
whether the data of P02, P03, P06, P07, and P08 agree with the
parameters of the motor.
Î Perform auto-tuning of the inverter for the motor to be used.
Make sure that F43 (Current limiter (Mode selection)) is set to "2" and
check the data of F44 (Current limiter (Level)).
Î Correct the F44 data. Or, if the current limiter operation is not
needed, set F43 to "0" (disabled).
Decrease the value of torque boost (F09), then run the motor again and
check if the speed increases.
Î Adjust the value of the torque boost (F09).
(8) The output frequency does not
increase due to the current
limiter operation.
Check the data of function codes F04, F05, H50, H51, H52 and H53 to
ensure that the V/f pattern setting is right.
Î Match the V/f pattern setting with the motor ratings.
(9) The output frequency does not
increase due to the torque
limiter operation.
Check whether data of torque limiter related function codes (F40, F41,
E16 and E17) is correctly configured and the "Select torque limiter level"
terminal command TL2 / TL1 is correct.
Î
Correct data of F40, F41, E16 and E17 or reset them to the factory
defaults (disable).
Î Set the TL2 / TL1 correctly.
(10) Bias and gain incorrectly
specified.
Check the data of function codes F18, C50, C32, C34, C37, C39, C42,
and C44.
Î Readjust the bias and gain to appropriate values.