Fuji Electric FRENIC-HVAC User Manual page 467

• Ensure that transistor output signals ([Y1] to [Y4]) and relay output signals ([Y5A] -
[Y5C], and [30A/B/C]) will not be turned ON.
• Disable the RS-485 communications link.
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
logic for them.
• Keep the ambient temperature within 25 ±10°C (77±18°F).
2) Turn ON the main circuit power.
3) Confirm that the inverter is in a 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. Check that "Capacitor capacitance measurement" is shown on the LCD
monitor.
In a case where "Capacitor capacitance measurement" is not shown on the LCD
monitor, measurement is not yet started.
6) After " . . . . " has disappeared from the LCD monitor, turn ON the main circuit power
again.
7) Select PRG > 3(INV Info) > 4(Maintenance) in Programming mode and note the reading
(relative capacitance (%) of the DC link bus capacitor).
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[ 2 ] Measuring the capacitance of 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.
Function
Name
code
H42 Capacitance of
DC link bus
capacitor
H47 Initial
capacitance of
DC link bus
capacitor
When replacing parts, clear or modify the H42 and H47 data. For details, refer to the
documents for maintenance.
---------------------------- 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 "Meas." (Setting H47 to "Meas" automatically
sets H42 to "Meas.")
• Capacitance of DC link bus capacitor (measured value)
• Start of initial capacitance measuring mode under ordinary
operating conditions (Meas)
• Measurement failure (Failed)
• Initial capacitance of DC link bus capacitor (measured value)
• Start of initial capacitance measuring mode under ordinary
operating conditions (Meas)
• Measurement failure (Failed)
6-157
6.3 Details of Function Codes
Data