Fuji Electric FRENIC-Ace series - Page 356

5.3 Description of Function Codes
5-186
DC fan lock detection (bit 5) (400 V class: FRN0203E2

-4

or above)
The inverter may be equipped with the internal air circulation DC fan depending on the capacity. When the inverter
detects that the DC fan is locked by a failure or other cause, you can select between continuing the inverter
operation or making 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 if the internal air circulation DC
fan is locked due to a failure etc. (When you start the inverter in this state, it automatically issues the run
fan command. Then the inverter detects the DC fan lock state, and turns ON the
“LIFE” or “OH”
output or
enters the alarm
0h1 state.)
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 (Bit 6)
(
dba
FRN0072E2

-4

or below, FRN0115E2

-2

or below, FRN0012E2

-7

or below )
Upon detection of a built-in 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.
To set data of function code H98, assign the setting of each function to each bit and then convert the 8-bit binary to
the decimal number. Refer to the assignment of each function to each bit and a conversion example below.
Bit Function Data = 0 Data = 1 Factory default
Bit 0 Lower the carrier frequency
automatically
Disable Enable 1: Enable
Bit 1 Detect input phase loss Continue to run Enter alarm
processing
1: Enter alarm
processing
Bit 2 Detect output phase loss Continue to run Enter alarm
processing
0: Continue to run
Bit 3 Select life judgment threshold
of DC link bus capacitor
Factory default User-defined setting 0: Factory default
Bit 4 Judge the life of DC link bus
capacitor
Disable
Enable 1: Enable
Bit 5 Detect DC fan lock Enter alarm
processing
Continue to run 0: Enter alarm
processing
Bit 6 Detect braking transistor
breakdown
Continue to run Enter alarm
processing
0: Continue to run
Decimal and binary conversion
Decimal = Bit 6 × 2
6
+ Bit 5 × 2
5
+ Bit 4 × 2
4
+ Bit 3 × 2
3
+ Bit 2 × 2
2
+ Bit 1 × 2
1
+ Bit 0 × 2
0
= Bit 7 × 128 + Bit 6 × 64 + Bit 5 × 32 + Bit 4 × 16 + Bit 3 × 8 + Bit 2 × 4 + Bit 1 × 2 + Bit 0 × 1
= 64 + 0 × 32 + 1 × 16 + 0 × 8 + 0 × 4 + 1 × 2 + 1 × 1
= 16 + 2 + 1
= 19