Danfoss VLT HVAC Drive FC 102 Operating Manual page 53

Maintenance, Diagnostics, a...
Freeze output The remote reference, which holds the present
speed, is active.
•
Freeze output was selected as a function
for a digital input (parameter group 5-1*
Digital Inputs). The corresponding terminal
is active. Speed control is only possible via
the terminal functions speed up and speed
down.
•
Hold ramp is activated via serial communi-
cation.
Freeze output A freeze output command was given, but the
request motor remains stopped until a run permissive
signal is received.
Freeze ref. Freeze reference was selected as a function for
a digital input (parameter group 5-1* Digital
Inputs). The corresponding terminal is active.
The frequency converter saves the actual
reference. Changing the reference is now only
possible via terminal functions speed up and
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 runs as programmed in
parameter 3-19 Jog Speed [RPM].
•
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 was selected as a reaction
for a monitoring function (for example No
signal). The monitoring function is active.
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
frequency converter, a permanent test current
is applied to the motor.
OVC control Overvoltage control was activated in
parameter 2-17 Over-voltage Control, [2]
Enabled. The connected motor supplies the
frequency converter with generative energy.
The overvoltage control adjusts the V/Hz ratio
to run the motor in controlled mode and to
prevent the frequency converter from tripping.
PowerUnit Off (Only frequency converters with a 24 V
external supply installed).
Mains supply to the frequency converter was
removed, and the control card is supplied by
the external 24 V.
MG16D402
Operating Guide
Protection md
Qstop
Ramping
Ref. high
Ref. low
Run on ref.
Run request
Running
Sleep Mode
Speed high
Speed low
Standby
Start delay
Start fwd/rev
Danfoss A/S © 02/2017 All rights reserved.
Protection mode is active. The unit has
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.
The motor is decelerating using
parameter 3-81 Quick Stop Ramp Time.
•
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.
The motor is accelerating/decelerating using
the active ramp up/down. The reference, a
limit value, or a standstill is not yet reached.
The sum of all active references is above the
reference limit set in parameter 4-55 Warning
Reference High.
The sum of all active references is below the
reference limit set in parameter 4-54 Warning
Reference Low.
The frequency converter is running in the
reference range. The feedback value matches
the setpoint value.
A start command was given, but the motor
remains stopped until a run permissive signal
is received via digital input.
The frequency converter drives the motor.
The energy-saving function is enabled. The
motor has stopped, but restarts automatically
when required.
Motor speed is above the value set in
parameter 4-53 Warning Speed High.
Motor speed is below the value set in
parameter 4-52 Warning Speed Low.
In auto-on mode, the frequency converter
starts the motor with a start signal from a
digital input or serial communication.
In parameter 1-71 Start Delay, a delay starting
time was set. A start command is activated
and the motor starts after the start delay time
expires.
Start forward and start reverse were selected
as functions for 2 different digital inputs
(parameter group 5-1* Digital Inputs). The
motor starts in forward or reverse direction
depending on which corresponding terminal is
activated.
7 7
51