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5-44
◆When you make measurement of capacity and life
expectancy judgment of capacitor with an actual
operating condition, set the value “30” to the function
code “E20 to E24”. And write the measurement result
U09 with an actual operating condition to the function
code U08 as an initial value as early as possible since
inverter operation starts.
However, life judgment by the measurement result
cannot be performed in case of 1 and 2 as below.
1. During inverter operation, a power supply is turned
off and it stops.
2. Cooling fan ON/OFF control is used.
(function code : H 06= 1)
Turn off the power supply of inverter, on the conditions
at which the inverter has stopped, and a cooling fan is
operated. It is not necessary to remove an option card
and the connection with a control terminal.
As for this "measurement with an actual operating
condition", carry out this measurement about 10 times
to minimize the error of a measurement result, and
make the average value into an initial value.
Moreover, when there is 10% or more of change from
the last measured value, measurement is disregarded
in order to prevent incorrect measurement. Renewal of
a display is not carried out.
◆Set measured value U09 to the initial value U08 after
exchanging capacitors.
Related Functions
E20 to E24
(Set value
：
30)
PC board
capacitor powered on time U10
◆The accumulation time of the capacitor on PC board
are displayed. The accumulation time of the control
power supply multiplied by the life expectancy
coefficient defined by the temperature inside the
inverter are displayed. Hence, the hours displayed
may not agree with the actual operating hours. Since
the accumulation time are counted by unit hours,
power input for less than one hour will be disregarded.
The accumulation time are displayed in TCAP=xxxxxh
of maintenance information. The standard at the
replacement time is 61,000h. Refer to the manual "8-2
regular check" for the maintenance.
U 1 0 U S E R 1 0
Setting range： 0 to 65535 hours
◆Clear the accumulation time to 0 hour, after replacing
the PC board on which capacitors are equipped with.
There is also PC Board without the capacitor
(ex :Control circuit board) not to be cleared the
accumulation time. For details, contact Fuji Electric.
Related Functions
E20 to E24
(Set value
：
30)
Cooling
fan
operating
time U11
◆The integrated operating hours of the cooling fan are
displayed. Since the integrated hours are counted by
unit hours, power input for less than one hour will be
disregarded. The integrated hours are displayed in
TFAN=xxxxxh of maintenance information.
The standard at the replacement time is 40,000h in the
inverter of 5HP or less. The standard at the
replacement time is 25,000h in the inverter of 7.5HP or
more. (Estimated life expectancy of a cooling-fan at
inverter ambient temperature of 40 degree.)
The displayed value should be considered as a rough
estimate because the actual life of a cooling fan is
influenced significantly by the temperature. Refer to
the manual "8-2 regular check" for the maintenance.
U 1 1 U S E R 1 1
Setting range : 0 to 65535 hours
◆ Clear integrated operating time to 0 hour after
replacing the cooling fan.
Related Functions
E20 to E24
(Set value
：
30)
Magnetize current vibration damping gainU13
◆Adjust if Magnetize current vibration was occurred in
the inverter output current .
U 1 3 U S E R 1 3
Setting range: 0 to 32767
◆Adjust the value from 0 to 2048 as a standard value.
Vibration damping gain becomes 100% in set value
4096.
Slip compensation filter time constant U15
◆The filter time constant of Slip compensation is set.
U 1 5 U S E R 1 5
Setting range : 0 to 32767
◆Calculate the filter time constant using the following
formula.
valuesetU15""
2
constanttimeFilter
16
=
[ms]
◆The response time of the control slows because the
filter time constant is enlarged when a value is set to
smaller. However, system becomes steady.
◆The response time of the control quickens because the
filter time constant becomes smaller, when a set value
is enlarged.
Note ： Response time quickens when a set value is
enlarged. Therefore, there is a possibility that the
output frequency becomes unstable. Please adjust
a set value to smaller than factory setting value.
Integral gain of continuous operation at power failure
U23
Proportional gain of continuous operation at power failure
U24
◆This function becomes effective, when function code
F14 (Restart mode after momentary power failure) set
value is 2 or 3.
U 2 3 U S E R 2 3
U 2 4 U S E R 2 4
Setting range : 0～65535
◆In case of F14 set value : 2.
When the operation continuation level (H15) is
reached, deceleration to a stop occurs. The DC
voltage of the main circuit sharpens the deceleration
slope, and the inverter collects the inertia energy of the
load to maintain the DC bus voltage and controls the
motor until it stops, so that the undervoltage protective
function is not activated.
The deceleration slope is adjusted with U23 and U24.
However, the deceleration operation time never
becomes longer than the set deceleration time.