Fuji Electric FRENIC-MEGA, Инструкция по эксплуатации

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7-5
5) The inverter automatically starts the measurement of the capacitance of the DC link bus capacitor. Make sure that " . . . . " appears
on the LED monitor.
If " . . . . " does not appear on the LED monitor, the measurement has not started. Check the conditions listed in 1).
6) After " . . . . " has disappeared from the LED monitor, turn ON the main circuit power again.
7) Shift to Menu #5 "5: MAINTENANC" in Programming mode, scroll to Page 2, and check the "CAP" value (Capacitance of the
DC link bus capacitor).
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[ 2 ] Measuring the capacitance of the DC link bus capacitor under ordinary operating conditions
When bit 3 of H98 data is 1, the inverter automatically measures the capacitance of the DC link bus capacitor under ordinary
operating conditions when the power is turned OFF. This measurement requires setting up the load conditions for ordinary operation
and measuring the reference capacitance when the inverter is introduced to the practical operation, using the setup procedure given
below.
--------------------------------------------------- Reference capacitance setup procedure -------------------------------------------------------
1) Set function code H98 (Protection/maintenance function) to enable the user to specify the judgment criteria for the service life of
the DC link bus capacitor (Bit 3 = 1) (refer to function code H98).
2) Turn OFF all run commands.
3) Make the inverter ready to be turned OFF under ordinary operating conditions.
4) Set both function codes H42 (Capacitance of DC link bus capacitor) and H47 (Initial capacitance of DC link bus capacitor) to
"0."
5) Turn OFF the inverter, and the following operations are automatically performed.
The inverter measures the discharging time of the DC link bus capacitor and saves the result in function code H47 (Initial
capacitance of DC link bus capacitor).
The conditions under which the measurement has been conducted will be automatically collected and saved.
During the measurement, " . . . . " will appear on the LED monitor.
6) Turn ON the inverter again.
Confirm that H42 (Capacitance of DC link bus capacitor) and H47 (Initial capacitance of DC link bus capacitor) hold right values.
Shift to Menu #5 "5: MAINTENANC" in Programming mode, scroll to Page 2, and confirm that the "CAP" value (ratio to full
capacitance) is 100%.
If the measurement has failed, "1" is entered into both H42 and H47. Remove the factor of the failure and conduct the
measurement again.
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Hereafter, each time the inverter is turned OFF, it automatically measures the discharging time of the DC link bus capacitor if the
above conditions are met. Periodically check the relative capacitance of the DC link bus capacitor (%) with Menu #5 "5:
MAINTENANC," Page 2, "CAP" in Programming mode.
The condition given above produces a rather large measurement error. If this mode gives you a lifetime alarm, set H98
(Maintenance operation) back to the default setting (Bit 3 (Select life judgment threshold of DC link bus capacitor) = 0)
and conduct the measurement under the condition at the time of factory shipment.
[ 3 ] Early warning of lifetime alarm
For the components listed in Table 7.3, the inverter can issue an early warning of lifetime alarm LIFE at one of the transistor output
terminals ([Y1] to [Y4]) and the relay contact terminals ([Y5A] - [Y5C], and [30A/B/C]) as soon as any of the levels specified in
Table 7.3 has been exceeded.
The early warning signal is also turned ON when a lock condition on the internal air circulation DC fan (provided on inverters of 75
HP or above for 230 V series and on those of 125 HP or above for 460 V series) has been detected.