5-57
Cooling fan in operation -- (FAN)
(Function code data = 25)
Under 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.
Auto-resetting -- (TRY)
(Function code data = 26)
This output signal comes ON when auto resetting is in progress. The auto-resetting is specified
by H04 and H05 (Auto-resetting). Refer to function codes H04 and H05 for details about the
number of resetting times and reset interval.
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 field bus,
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 field bus,
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
0h1
actually happens.
This signal comes ON when the temperature of the heat sink exceeds the the "overheat trip
0h1
temperature minus 5°C," and it goes OFF when it drops down to the "overheat trip
0h1
temperature minus 8°C."
This signal comes ON also when the internal air circulation DC fan (50 HP or above for 208V
series or 75 HP or above for 460V series) has locked.
Service life alarm -- (LIFE)
(Function code data = 30)
This output signal comes ON when it is judged that the service life of any one of electrolytic
capacitors on the PCBs, DC link bus capacitor and cooling fan has expired.
This signal comes ON also when the internal air circulation DC fan (50 HP or above for 208V
series or 75 HP or above for 460V series) has locked.
This signal should be used as a guide for replacement of the capacitors and cooling fan. If this
signal comes ON, use the specified maintenance procedure to check the service life of these
parts and determine whether the parts should be replaced or not.
For details, refer to Section 7.3, Table 7.3 "Criteria for Issuing a Lifetime Alarm."
Command loss detected -- (REF OFF)
(Function code data = 33)
This output signal comes ON when an analog input used as a frequency command source is in a
command loss state (as specified by E65) due to a wire break or a weak connection. This signal
goes OFF when the operation under the analog input is resumed.
For details of the command loss detection, refer to the descriptions of function code E65.
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