5.4 Details of Function Codes
5-209
Chapter 5 Function Code
Details of
Function Codes
F codes
E codes
C codes
P codes
H97 to H98
A codes
b codes
r codes
J codes
d codes
U codes
y codes
Judgment on the life of main circuit capacitor (Bit 4)
Whether the main circuit capacitor has reached its life is judged by measuring the discharging time after
power off. The discharging time is determined by the capacitance of the main circuit capacitor and the load
inside the inverter. Therefore, when the load condition inside of the inverter fluctuate largely, correct
measurement is not possible. In some conditions, end of lifetime is judged wrongly. To avoid such an error,
you can disable the judgment based on the discharging time from the main circuit capacitor. (Even if it is
disabled, the judgment based on the "ON-time counting" while the voltage is applied to the main circuit
capacitor is continued.)
For details about the life prediction function, see H42.
Since load may fluctuate significantly in the following cases, disable the judgment on the life during operation.
During periodical maintenance, either conduct the measurement with the judgment enabled under
appropriate conditions or conduct the measurement under the operating conditions matching the actual
ones.
- Auxiliary input for control power is used.
- An option card is used.
- Another inverter or equipment such as a PWM converter is connected to terminals of the DC link bus.
DC fan lock detection (Bit 5)
(200 V class series: 45 kW or above, 400 V class series: 75 kW or above)
An inverter of 45 kW or above (200 V class series), or of 75 kW or above (400 V class series) is equipped
with the internal air circulation DC fan. When the inverter detects that the DC fan is locked by a failure or
other cause, you can select either continuing the inverter operation or having the inverter enter into the alarm
state.
Entering alarm state: The inverter issues the alarm
0h1
and allows the motor to coast to a stop.
Continuing operation: The inverter does not enter the alarm state and continues to run the motor.
Note that, however, the inverter turns on the
OH and LIFE signals on the transistor output terminals
whenever the DC fan lock is detected regardless of your selection.
If the ON/OFF control of the cooling fan is enabled (H06 = 1), the cooling fan may stop depending
on the operating condition of the inverter. In this case, the DC fan lock detection feature is
considered normal (e.g., the cooling fan is normally stopped by the stop fan command.) so that the
inverter may turn OFF the
LIFE or OH signal output, or enable to cancel the alarm
0h1
, even i
the internal air circulation DC fan is locked due to a failure etc. (When re-operated, the fan
operation command is output, and
LIFE or OH signals turns on, or
0h1
alarm is output.)
Note that, operating the inverter with the DC fan being locked for a long time may shorten the service life of
electrolytic capacitors on the PCBs due to local high temperature inside the inverter. Be sure to check with
the
LIFE signal etc., and replace the broken fan as soon as possible.
Braking transistor error detection (
dba
22 kW or below) (bit 6)
Upon detection of an integrated braking transistor error, this feature stops the inverter and displays an alarm
dba
. Set data of this bit to "0" when the inverter does not use a braking transistor and there is no need of
entering an alarm state.
Switch IP20/IP40 (bit 7) (for basic type of inverters with a capacity of 22 kW or below)
In case of an inverter with 22 kW or lower, the protective structure can be switched from IP20 to IP40 as an
option. However, in that case, it is necessary to switch to protective levels that match to IP40 in the
protection level adjustment.
For details, see the instruction manual of the IP40 option.
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