5.4 Details of Function Codes
5-193
Details of
Function Codes
F codes
E codes
C codes
P codes
H30 to H48
A codes
b codes
r codes
J codes
d codes
U codes
y codes
Chapter 5 Function Code
H42, H43,
H48
Main Circuit Capacitor Measurement Value, Cooling Fan Cumulative Run Time
Printed Circuit Board Capacitor Cumulative Run Time
Related Function Code: H47 (Initial Capacitance of DC Link Bus Capacitor)
H98 (Protection/Maintenance Function)
Life Prediction Function
The inverter has the life prediction function for the parts with lifetime. The lifetime prediction information can
be checked on the LED monitor. (The life prediction function can also issue early warning signals if the
lifetime alarm command
LIFE is assigned to any of the digital output terminals by any of E20 through E24
and E27.)
The predicted values should be used only as a guide since the actual service life is influenced by the
surrounding temperature and other usage environments.
Table 5.4-128
Objective Parts Life Prediction Method End-of-life Criteria
Prediction
Timing
LED Monitor
Display
End of life is judged when the
capacitance is 85% or lower
compared to the initial
capacitance at shipment
(See "[1] Measuring the
capacitance of main circuit
capacitor in comparison with initial
one at shipment" on the next
page.)
At periodic
inspection
(H98: Bit 3
= 0)
5_05
(Capacitance)
Main circuit capacitor capacity
calculation
Measures the discharging
time of the main circuit
capacitor during shut-down of
the main power and
calculates the capacitance.
End of lifetime is judged when the
capacitance is 85% or lower when
compared with the capacitance of
the main circuit capacitor under
user's standard operation
conditions (necessary to measure
at the time of start-up).
(See "[2] Measuring method of the
capacitance of the main circuit
capacitor at the power shut-down
under standard operating status"
on page 5-195.)
During
ordinary
operation
H98: Bit 3 =
1
5_05
(Capacitance)
Main circuit
capacitor
Voltage-applied time count to
the main circuit capacitor
Counts the time that the
voltage is applied to the main
circuit capacitor (main power
on time). In addition, the time
can be corrected by the
capacitance of measurement
of main circuit capacitor.
End of lifetime is judged when the
operating time exceeds 87,600
hours (10 years)
During
ordinary
operation
5_26
(Elapsed time)
5_27
(Time
remaining
before the end
of life)
Electrolytic
capacitors on
printed circuit
boards
It counts the period when the
voltage is applied to the
electrolytic capacitors on the
printed circuit boards. In
addition, the elapsing time
can be corrected with the
surrounding temperature.
End of lifetime is judged when the
operating time exceeds 87,600
hours (10 years)
During
ordinary
operation
5_06
(Operation
time)
Cooling fans Counts the run time of the
cooling fans.
End of lifetime is judged when the
operating time exceeds 87,600
hours (10 years)
During
ordinary
operation
5_07
(Operation
time)
Capacitance Measurement of the Main Circuit Capacitor (H42)
Calculating the Capacitance of the Main Circuit Capacitor
- The discharging time of the main circuit capacitor depends largely on the inverter's internal load
conditions, e.g. options attached or ON/OFF of digital I/O signals. If actual load conditions are so different
from the ones at which the initial/reference capacitance is measured that the measurement result falls out
of the accuracy level required, then the inverter does not perform measuring.
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