YASKAWA Varispeed L7, Инструкция по эксплуатации, Страница: 171 / 243

5
-42
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Cooling Fan Control
This function controls the fan which is mounted to the inverters heatsink.
„ Related Parameters
„ Selecting the Cooling Fan Control
Using parameter L8-10 two modes can be selected:
0: The fan is ON only when the inverter output is ON, i.e. a voltage is output. This is the factory setting. The
turn OFF delay time for the fan can be set in parameter L8-11. After a stop command the inverter waits for
this time before switching OFF the cooling fan. The factory setting is 60 sec.
1: The fan is ON whenever the inverter power supply is switched ON.
‹
Setting the Ambient Temperature
„ Related Parameters
At high ambient temperatures an output current derating has to be considered. The derating depends on the
ambient temperture. The derating curve is shown in
Fig 5.19 . To ensure a safe inverter protection at high
ambient temperatures, always set parameter L8-15 to the actual ambient temperature.
Fig 5.19 Ambient Temperature Derating Curve
Parameter
No.
Name
Factory
Setting
Change
during
Operation
Control Methods
V/f
Open
Loop
Vector
Closed
Loop
Vector
L8-10 Cooling fan control selection 0 No A A A
L8-11 Cooling fan control delay time 60 s No A A A
Parameter
No.
Name
Factory
Setting
Change
during
Operation
Control Methods
V/f
Open
Loop
Vector
Closed
Loop
Vector
L8-12 Ambient Temperature 45° C No A A A
0
2 0
4 0
6 0
8 0
10 0
0 10 2 0 3 0 4 0 50 6 0
Tem perature (°C)
Output Current in % of the
Rated Current
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