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104(110) COMMISSIONING
8
8. COMMISSIONING
8.1 Safety
Before commissioning, note the following directions and warnings:
1
Internal components and circuit boards of the frequency converter (ex-
cept for the galvanically isolated I/O terminals) are
live
when NX is
connected to mains potential.
Coming into contact with this voltage is
extremely dangerous and may cause death or severe injury.
2
The motor terminals U, V, W and the DC-link/brake resistor terminals –/+
are
live
when NX is connected to mains,
even if the motor is not
running
.
3
The control I/O-terminals are isolated from the mains potential. However,
the relay outputs and other I/O-terminals may have a dangerous control
voltage present even when NX is disconnected from mains.
4
Do not make any connections with the frequency converter connected to
the mains.
5
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 min-
utes before doing any work on NX connections. Do not even open the
cover before this time has expired.
6
Before connecting the frequency converter to mains make sure that the
NX front cover is closed.
7
When running, the side of converter FR8 is burning hot. Do not touch
with hands!
8
When running, the back of frequency converter FR6 is burning hot.
Therefore it MUST NOT be mounted onto a surface which is not fireproof.
8.2 Commissioning of the frequency converter
1
Read carefully the safety instructions in Chapter 1 and above and follow them.
2
After 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
6.1.5, 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.
3
Check the quality and quantity of cooling air (chapter 5.2 and Table 5-11).
4
Check the inside of the frequency converter for condensation.
5
Check that all Start/Stop switches connected to the I/O terminals are in
Stop
-position.
6
Connect the frequency converter to mains.
WARNING
HOT SURFACE