Contents

Cooling Fan Control
This function controls the fan which is mounted to the inverters heatsink.
•Related Parameters
Parameter
No.
Name
Factory
Setting
Change
during
Operation
V/f
Control Methods
Open
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
Closed
Loop
Vector
•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
Parameter
No.
Name
Factory
Setting
Change
during
Operation
Control Methods
At high ambient temperatures an output current derating has to be considered. The derating depends on the
ambient temperature. The derating curve is shown in Fig 5.48. To ensure a safe inverter protection at high
ambient temperatures, always set parameter L8-15 to the actual ambient temperature.
V/f
Open
Loop
Vector
L8-12 Ambient Temperature 45° C No A A A
Closed
Loop
Vector
10 0
Output Current in % of the
Rated Current
80
60
40
20
0
0 10 20 30 40 50 60
Temperature (°C)
Fig 5.48 Ambient Temperature Derating Curve
5-42