Danfoss Vacon NXP Series Operating Manual page 109

Operating guide | VACON® NXS/NXP Air-cooled
Procedure
1. To find the Hardware settings submenu, scroll down in the System menu until the location indication S6.7 shows on the first line of
the display.
2. To go to the Hardware settings submenu from the System menu, push the Menu button Right.
8.7.8.2 Setting the Internal Brake Resistor Connection
Context:
Use this function to tell the AC drive if the internal brake resistor is connected or not.
If the AC drive has an internal brake resistor, the default value of this parameter is Connected. We recommend changing this value to
Not conn. if:
• it is necessary to install an external brake resistor to increase the braking capacity
• the internal brake resistor is disconnected for some reason.
Prerequisites:
The brake resistor is available as optional equipment for all sizes. It can be installed internally in enclosure sizes FR4 to FR6.
Procedure
1. In the Hardware settings submenu, find the Internal brake resistor connection (6.7.1) subpage with the Browser buttons.
2. To go to the edit mode, push the Menu button Right.
3. To change the internal brake resistor status, use the Browser buttons.
4. To accept the change, push the [enter] button.
8.7.8.3 Fan Control
Use this function to control the cooling fan of the AC drive. There are 4 options to select from:
• Continuous (default setting). The fan is always on when the power is on.
• Temperature. The fan starts automatically when the heat sink temperature goes to 60 °C (140 °F) or when the AC drive operates. The
fan stops about a minute after one of the following:
- the heat sink temperature falls to 55 °C (131 °F)
- the AC drive stops
- the fan control value is changed from Continuous to Temperature
• First start. When power is on, the fan is in the stop state. When the AC drive gets the first start command, the fan starts.
• Calc temp. The fan function agrees to the calculated IGBT temperature:
- If the IGBT temperature is more than 40 °C (104 °F), the fan starts.
- If the IGBT temperature is below 30 °C (86 °F), the fan stops.
As the default temperature at power-up is 25 °C (77 °F), the fan does not start immediately.
For instructions, see 8.7.8.4 Changing the Fan Control
Danfoss A/S © 2018.06
Settings.
Using the Control Panel
DPD00910G | 109