Danfoss vlt FC 102 Operating Guide

•
•
•
•
•
•
•
•
•
•
[20] Freeze output is selected as a function for a digital input (parameter group 5-1* Digital Inputs). The corre-
sponding terminal is active. Speed control is only possible via the terminal options [21] Speed up and [22]
Speed down.
Hold ramp is activated via serial communication.
Freeze out-
put request
A freeze output command was given, but the motor remains stopped until a run permissive signal is received.
Freeze ref.
[19] Freeze reference is selected as a function for a digital input (parameter group 5-1* Digital Inputs). The corre-
sponding terminal is active. The drive saves the actual reference. Changing the reference is now only possible via
terminal options [21] Speed up and [22] Speed down.
Jog request
A jog command was given, but the motor remains stopped until a run permissive signal is received via a digital
input.
Jogging
The motor is running as programmed in parameter 3-19 Jog Speed [RPM].
[14] Jog was selected as a function for a digital input (parameter group 5-1* Digital Inputs). The corresponding
terminal (for example, terminal 29) is active.
The jog function is activated via the serial communication.
The jog function is selected as a reaction for a monitoring function (for example, for the no signal function).
The monitoring function is active.
Motor check
In parameter 1-80 Function at Stop, [2] Motor Check is 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.
OVC control
Overvoltage control is activated via parameter 2-17 Over-voltage Control, [2] Enabled. The connected motor sup-
plies the drive with generative energy. The overvoltage control adjusts the V/Hz ratio to run the motor in control-
led mode and to prevent the drive from tripping.
PowerUnit
Off
(Only drives with a 24 V external supply installed). Mains supply to the drive was removed, and the control card is
supplied by the external 24 V.
Protection
md
Protection mode is active. The unit detected a critical status (overcurrent or overvoltage).
To avoid tripping, switching frequency is reduced to 4 kHz.
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 is decelerating using parameter 3-81 Quick Stop Ramp Time.
[4] Quick stop inverse is selected as a function for a digital input (parameter group 5-1* Digital Inputs). The corre-
sponding terminal is not active.
The quick stop function is activated via serial communication.
Ramping
The motor is accelerating/decelerating 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 was given, but the motor remains stopped until a run permissive signal is received via digital
input.
Running
The drive drives the motor.
Sleep Mode
The energy-saving function is enabled. The motor has stopped, but restarts automatically when required.
AQ267037536117en-000101 / 130R0083 | 65Danfoss A/S © 2023.09
Diagnostics and Troubleshooting
VLT HVAC Drive FC 102
Operating Guide

Danfoss vlt FC 102 Specifications

General

Brand	Danfoss
Model	vlt FC 102
Category	DC Drives
Language	English