Before Commencing Repair Work; Special Conditions - Danfoss FC 100 Series Operating Instructions Manual

Safety
Installation at high altitudes
2 2
380 - 500 V, enclosure A, B and C: At altitudes above 2
km, please contact Danfoss regarding PELV.
380 - 500 V, enclosure D, E and F: At altitudes above 3
km, please contact Danfoss regarding PELV.
525 - 690 V: At altitudes above 2 km, please contact
Danfoss regarding PELV.
Warning against Unintended Start
1. The motor can be brought to a stop by means
of digital commands, bus commands, referen-
ces or a local stop, while the frequency
converter is connected to mains. If personal
safety considerations make it necessary to
ensure that no unintended start occurs, these
stop functions are not sufficient.
2. While parameters are being changed, the
motor may start. Consequently, the stop key
[STOP/RESET] must always be activated;
following which data can be modified.
3. A motor that has been stopped may start if
faults occur in the electronics of the frequency
converter, or if a temporary overload or a fault
in the supply mains or the motor connection
ceases.
Touching the electrical parts may be fatal - even after
the equipment has been disconnected from mains.
Also make sure that other voltage inputs have been discon-
nected, such as external 24 V DC, load sharing (linkage of DC
intermediate circuit), as well as the motor connection for
kinetic back up. Refer to the Operating Instructions for further
safety guidelines.
The frequency converter DC link capacitors remain
charged after power has been disconnected. To avoid
an electrical shock hazard, disconnect the frequency
converter from the mains before carrying out mainte-
nance. Wait at least as follows before doing service on
the frequency converter:
10
®
VLT HVAC Drive Operating Instructions
Voltage
(V)
200 -
240
380 -
480
525 -
600
525 -
690
Be aware that there may be high voltage on the DC link even when
the LEDs are turned off.

2.1.4 Before Commencing Repair Work

1.
2.
3.
4.

2.1.5 Special Conditions

Electrical ratings:
The rating indicated on the nameplate of the frequency
converter is based on a typical 3-phase mains power supply,
within the specified voltage, current and temperature range,
which is expected to be used in most applications.
The frequency converters also support other special applica-
tions, which affect the electrical ratings of the frequency
converter.
Special conditions which affect the electrical ratings might be:
•
•
•
Other applications might also affect the electrical ratings.
Consult the relevant sections in this manual and in the VLT
HVAC Drive Design Guide, MG.11.BX.YY for information about
the electrical ratings.
®
MG.11.AD.02 - VLT is a registered Danfoss trademark
Min. Waiting Time (Minutes)
4 15 20
1.1 - 3.7 5.5 - 45
kW kW
1.1 - 7.5 11 - 90 kW 110 - 250
kW kW
1.1 - 7.5 11 - 90 kW
kW
11 - 90 kW 45 - 400
kW
Disconnect the frequency converter from mains
Disconnect DC bus terminals 88 and 89
Wait at least the time mentioned in section General
Warning above
Remove motor cable
Single phase applications
High temperature applications which require de-
rating of the electrical ratings
Marine applications with more severe environmental
conditions.
30 40
315 - 1000
kW
450 - 1400
kW