Cooling Fan Control; Setting The Ambient Temperature - Omron VARISPEED L7 Manual

Cooling Fan Control

This function controls the fan which is mounted to the inverters heatsink.
Related Parameters
Parameter
No.
L8-10 Cooling fan control selection
L8-11 Cooling fan control delay time
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.
L8-12 Ambient Temperature
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
ambient temperatures, always set parameter L8-15 to the actual ambient temperature.
10 0
8 0
6 0
4 0
2 0
0
0
Name
Name
10 2 0 3 0 4 0
Tem perature (°C)
Fig 6.20 Ambient Temperature Derating Curve
Change
Factory
during
Setting
V/f
Operation
0 No A
60 s No A
Change
Factory
during
Setting
V/f
Operation
45° C No A
Fig 6.20. To ensure a safe inverter protection at high
50 6 0
Control Methods
Closed
Open Closed
Loop
Loop Loop
Vector
Vector Vector
(PM)
A A A
A A A
Control Methods
Closed
Open Closed
Loop
Loop Loop
Vector
Vector Vector
(PM)
A A A
6-
6
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