Fuji Electric FRENIC-Ace series - At Shipment

5.3 Description of Function Codes
5-171
FUNCTION CODES
Chap 5
[ 1 ] Measuring the capacitance of DC link bus capacitor in comparison with initial one
at shipment
When bit 3 of H98 data is 0, the measuring procedure given below measures the capacitance of DC link bus
capacitor in comparison with initial one at shipment when the power is turned OFF. The measuring result can be
displayed on the keypad as a ratio (%) to the initial capacitance.
----------------------------------------------Capacitance measuring procedure----------------------------------------
1) To ensure validity in the comparative measurement, put the condition of the inverter back to the state at
factory shipment.
• Remove the option card (if already in use) from the inverter.
• In case another inverter is connected via the DC link bus to the P(+) and N(-) terminals of the main circuit,
disconnect the wires. (You do not need to disconnect a DC reactor (optional), if any.)
• Disconnect power wires for the auxiliary input to the control circuit (R0, T0).
• In case the standard keypad has been replaced with an optional multi-function keypad TP-A1-E2C after
the purchase, put back the original standard keypad.
• Turn OFF all the digital input signals fed to terminals [FWD], [REV], and [X1] through [X5] of the control
circuit
• If a potentiometer is connected to terminal [13], disconnect it.
• If an external apparatus is attached to terminal [PLC], disconnect it.
• Ensure that transistor output signals ([Y1] and [Y2]) and relay output signals ([30A/B/C]) will not be turned
ON.
• Disable the RS-485 and built-in CAN communications links.
If negative logic is specified for the transistor output and relay output signals, they are considered
ON when the inverter is not running. Specify positive l
ogic for them.
• Keep the surrounding temperature within 25 ±10℃.
2) Turn ON the main circuit power.
3) Confirm that the cooling fan is rotating and the inverter is in stopped state.
4) Turn OFF the main circuit power.
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) Select Menu #5 “Maintenance Information” in Programming mode and note the reading (relative capacitance
(%) of the DC link bus capacitor).
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