GE Fuji Electric MICRO-SAVER AF-300, Руководство для стартапов

Страница: 97 / 127

7-2 7-3
Estimation of service life using maintenance information
Menu #5 “Maintenance Information” in Program mode can be used to display the recommended time for replace-
ment of the intermediate dc circuit capacitor, electrolytic capacitors on the printed circuit board, and cooling fan.
When operating time exceeds the early warning level, an early warning signal is output to any external device
through terminal [Y1] (function code E20). When any replacement exceeds the recommended time, terminal [Y1] also
outputs an ON signal.)
Table 7.2 Parts Replacement Time Estimation with Menu #5 “Maintenance Information”
Parts to be replaced Judgement level
Intermediate dc circuit capacitor 85% or lower of the capacitance than that of the factory setting
Electrolytic capacitor on the printed circuit board 61,000 hours or longer as accumulated run time
Cooling fan
(Applicable motor rating: 2 to 5 hp)
61,000 hours or longer as accumulated run time
(Assumed life of cooling fan at ambient drive temperature of 40 °C)
(1) Intermediate dc circuit capacitor
Determine the capacitance of the intermediate dc circuit capacitor as follows:
Capacitance is displayed as a reduction ratio (%) of the initial value written to the drive memory before shipment.
Capacitance measurement procedure
1) Remove the RS485 communications card (option) from the drive if it is mounted. Disconnect the dc bus link
circuit to other drives from terminals P (+) and N (-) of the main circuit if any. A dc reactor (option) or braking
resistor (option) need not be disconnected. Keep the ambient temperature at 25
±
10
°
C.
2) Turn off the digital inputs (FWD, REV, and X1 to X3) at the control terminals.
– If an external potentiometer is connected, to terminal [13], remove it.
– Set the data of function codes E20 and E27 so that the transistor output [Y1] or relay output [30A, B, C] do
not come ON while the drive power is turned off. (The recommended settings are to assign normal logic signal
(RUN) and (ALM) to terminals [Y1] and [30A, B, C] respectively.
3) Turn the drive power on.
4) Check that the cooling fan rotates and the drive is at a stop.
5) Turn the main power supply off. Start measuring the capacitance of intermediate dc circuit capacitor.
6) After the LED monitor goes completely dark, turn the main power supply on again.
7) Select Menu #5 “Maintenance information” in Program mode, and check the reduction ratio (%) of the capaci-
tance of the intermediate dc circuit capacitor.
(2) Electrolytic capacitors on the printed circuit boards
The drive counts hours for which the power has been applied to the control circuit. The accumulated time will be
multiplied by the life constant depending on the temperature inside the drive, and displayed on the LED monitor.
According to the displayed hours, determine when capacitors should be replaced. The display unit is 1000 hours.
(3) Cooling fan
The drive accumulates hours for which the cooling fan has run. The display unit is 1000 hours.
The accumulated time should be used just a guide, since the actual service life will be significantly affected by
temperature and operating environment.
StockCheck.com