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U08 Initial value of main DC link capacitor
U09 Measured value of main DC link capacitor
Data for the life expectancy judgment of the
capacitor in main circuit is stored in this
function. The electrical discharge time of the
capacitor can be measured automatically, and
the time of part replacement can be confirmed
according to the decrement rate from the
factory shipment.
U 0 8
U S E R
U 0 9
U S E R
Setting range : 0 to 65535
The electrical discharge time which is
measured in the factory shipment is set to
function code U08 as a initial value. This
value is different in each inverter.
The electrical discharge time of the capacitor
is measured automatically, when the power
supply is turned off. And, the result is stored in
function code U09.
When the power supply is turned off under the
conditions as follows, decrement rate (%) to
the factory shipment can be measured.
Conditions: which has been described to
"*Estimation of life expectancy based on
maintenance information" of the instruction
manual "8-2 periodical inspection".
U09
100
The result of
U08
CAP=xxx.x% of maintenance information. At
85% it may be necessary to replace the
capacitors.
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 before inverter operation starts.
However, life judgment by the measurement
result cannot be performed in case of
2
.
1
During inverter operation, the power
supply is turned off .
2
Cooling fan ON/OFF control is used.
(function code : H 06= 1)
5-68
0 8
0 9
is displayed in
and
1
Turn off the power supply of inverter, until the
inverter and the cooling fan have stopped. It
is not necessary to remove an option card or
control terminal connections.
As for "measurement with actual operating
conditions", carry out this measurement about
10 times to minimize the error of measured
results, and make an average value into an
initial value .
If there is 10% or more of difference from the
last measured value, measurement should be
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.
U10 PCB board capacitor powered on time
The accumulation time of the capacitor on PC
board is displayed. The accumulated time of
the control power supply multiplied by the life
expectancy
coefficient
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 accumulated time is displayed in
TCAP=xxxxxh of maintenance information.
The standard at the replacement time is
61,000h. Refer to the manual "8-2 Periodic
Inspection" for the further information.
U 1 0
U S E R
Setting range: 0 to 65535 hours
Clear the accumulated time to 0 hours, after
replacing the PC board on which the
capacitors are mounted.
120
Related Functions
E20~E24
(Set value :30)
defined
by
the
1 0
Related Functions
E20~E24
(Set value :30)
5 Function Selection
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