Commissioning | 81(86) |
8.COMMISSIONING
8.1 Safety
Before commissioning, note the following directions and warnings:
WARNING
1 |
2 |
3 |
4 |
5 |
6 |
Internal components and circuit boards of the frequency converter (except for the galvanically isolated I/O terminals) are live when the NX is connected to mains potential. Coming into contact with this voltage is extremely dangerous and may cause death or severe injury.
The motor terminals U, V, W and the
The control
Do not make any connections with the frequency converter connected to the mains.
After having disconnected the frequency converter from the mains, wait until the fan stops and the indicators on the keypad go out (if no keypad is attached see the indicator through the keypad base). Wait 5 more minutes before doing any work on the NX connections. Do not even open the cover before this time has expired.
Before connecting the frequency converter to mains make sure that the NX front cover is closed.
8.2 Commissioning of the frequency converter
1Read the safety instructions in Chapter 1 and above and follow them.
2After the installation, pay attention to:
-that both the frequency converter and the motor are grounded.
-that the mains and motor cables comply with the requirements given in Chapter 6.1.1.
-that the control cables are located as far as possible from the power cables (see
Chapter 6.1.2, step 3), the shields of the shielded cables are connected to protective
earth 
. The wires may not touch the electrical components of the frequency converter.
-that the common inputs of digital input groups are connected to +24V or ground of the I/O terminal or the external supply.
3Check the quality and quantity of cooling air (Chapter 5.2, and Table
4Check the inside of the frequency converter for condensation.
5Check that all Start/Stop switches connected to the I/O terminals are in
6Connect the frequency converter to mains.
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