Fuji Electric FRENIC-HVAC User Manual page 422

Pattern operation stage number

-- STG1, STG2, and STG4 (Function code data = 18, 19, and 20)
With the combination of STG1, STG2 and STG4, the inverter outputs the current operating
stage.
 Refer to C21 through C28.
Pattern operation
stage number
Stage 1
Stage 2
Stage 3
Stage 4
Stage 5
Stage 6
Stage 7
The inverter issues no signal from any of these terminals when a pattern operation is not
carried out (no stage is selected).
Cooling fan in operation -- FAN (Function code data = 25)

With the cooling fan ON/OFF control enabled (H06 = 1), this output signal is ON when the
cooling fan is in operation, and OFF when it is stopped. This signal can be used to make the
cooling system of peripheral equipment interlocked for an ON/OFF control.
 Refer to H06.
Auto-resetting -- TRY (Function code data = 26)

This output signal comes ON when auto resetting (resetting alarms automatically) is in
progress.
 Refer to H04 and H05.
Universal DO -- U-DO (Function code data = 27)

Assigning this output signal to an inverter's output terminal and connecting the terminal to a
digital input terminal of peripheral equipment via the RS-485 communications link or the
fieldbus, allows the inverter to send commands to the peripheral equipment.
The universal DO can be used as an output signal independent of the inverter operation.
 For the procedure for access to Universal DO via the RS-485 communications link or
fieldbus, refer to the respective instruction manual.
Heat sink overheat early warning -- OH (Function code data = 28)

This output signal is used to issue a heat sink overheat early warning that enables you to take
a corrective action before an overheat trip OH1 actually happens.
This signal comes ON when the temperature of the heat sink exceeds the "overheat trip
temperature minus 5°C (9°F)," and it goes OFF when it drops down to the "overheat trip
temperature minus 8°C (14°F)."
Output terminal
STG1 STG2
ON OFF
OFF ON
ON ON
OFF OFF
ON OFF
OFF ON
ON ON
6-112
STG3
OFF
OFF
OFF
ON
ON
ON
ON