Danfoss VLT FC Series Service Guide

Kinetic back-up In parameter 14-10 Mains Failure, a function
was set as [4] kinetic back-up. The mains
voltage is below the value set in
parameter 14-11 Mains Fault Voltage Level. The
drive is running the motor momentarily with
kinetic energy from the inertia of the load.
Motor check In parameter 1-80 Function at Stop, [2] Motor
Check was selected. A stop command is active.
To ensure that a motor is connected to the
drive, a permanent test current is applied to
the motor. Only available in VLT
®
HVAC Drive
FC 102 and VLT
®
AQUA Drive FC 202.
O1 [1] PROFIdrive prole was selected in
parameter 8-10 Control Prole. The O1
function is activated via serial communication.
The motor is stopped via the ramp.
O2 [1] PROFIdrive prole was selected in
parameter 8-10 Control Prole. The O2
function is activated via serial communication.
The output of the drive is disabled
immediately and the motor coasts.
O3 [1] PROFIdrive prole was selected in
parameter 8-10 Control Prole. The O3
function is activated via serial communication.
The motor is stopped via the ramp.
OVC control [2] Enabled was activated in
parameter 2-17 Over-voltage Control. The
connected motor supplies the drive with
generative energy. The overvoltage control
adjusts the V/Hz ratio to run the motor in
controlled mode, and to prevent the drive
from tripping.
Power unit o (For drives with a 24 V external supply
installed only.) Mains supply to the drive is
removed, but the control card is supplied by
the external 24 V.
Pre-magnetize Premagnetization is selected in
parameter 1-80 Function at Stop. A stop
command (for example, stop inverse) is
activated. A suitable constant magnetizing
current is applied to the motor.
Protection md Protection mode is active. The unit has
detected a critical status (an overcurrent or
overvoltage).
•
To avoid tripping, the switching frequency
is reduced to 1500 kHz if
parameter 14-55 Output Filter is set to [2]
Sine-Wave Filter Fixed. Otherwise, the
switching frequency is reduced to 1000 Hz.
•
If possible, protection mode ends after
approximately 10 s.
•
Protection mode can be restricted in
parameter 14-26 Trip Delay at Inverter Fault.
QStop The motor decelerates using
parameter 3-81 Quick Stop Ramp Time.
•
[4] Quick stop inverse was selected as a
function for a digital input (parameter
group 5-1* Digital Inputs). The
corresponding terminal is not active.
•
The quick stop function was activated via
serial communication.
Ramping The motor accelerates/decelerates using the
active ramp up/down. The reference, a limit
value, or a standstill is not yet reached.
Ref. high The sum of all active references is above the
reference limit set in parameter 4-55 Warning
Reference High.
Ref. low The sum of all active references is below the
reference limit set in parameter 4-54 Warning
Reference Low.
Run on ref. The drive is running in the reference range.
The feedback value matches the setpoint
value.
Run request A start command has been given, but the
motor is stopped until a run permissive signal
is received via digital input. Only available in
VLT
®
HVAC Drive FC 102 and VLT
®
AQUA Drive
FC 202.
Running The drive propels the motor, the ramping
phase is done, and the motor revolutions are
outside the on-reference range. Occurs when 1
of the motor speed limits (parameters 4-11 to
4-14) is set, but the maximum reference is
outside this range.
Sleep boost The boost function in parameter 22-45 Setpoint
Boost is enabled. This function is only possible
in closed-loop operation. Only available in
VLT
®
HVAC Drive FC 102 and VLT
®
AQUA Drive
FC 202.
Sleep mode The energy saving function is enabled, which
means the motor has now stopped, but
restarts automatically when required. Only
available in VLT
®
HVAC Drive FC 102 and VLT
®
AQUA Drive FC 202.
Speed down The value set in parameter 3-12 Catch up/slow
Down Value is used to correct the output
frequency.
•
Speed down was selected as a function for
a digital input (parameter group 5-1* Digital
Inputs). The corresponding terminal is
active.
•
Speed down was activated via serial
communication.
Speed high Motor speed is above the value set in
parameter 4-53 Warning Speed High.
Speed low Motor speed is below the value set in
parameter 4-52 Warning Speed Low.
Operator Interface and Driv...
VLT
®
FC Series, D1h–D8h, Da2/Db2/Da4/Db4, E1h–E4h, J8/J9
36 Danfoss A/S © 02/2019 All rights reserved. MG94A502
44

Danfoss VLT FC Series Specifications

General

Brand	Danfoss
Model	VLT FC Series
Category	DC Drives
Language	English