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Operation
status
Description
Freeze out-
put request
A freeze output command has been given, but the motor remains stopped until a run permissive signal is re-
ceived.
Freeze ref.
[19] Freeze Reference
was 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 functions speed up and speed down.
Jog request
A jog command has been given, but the motor is 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 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 drive, a permanent test current is applied to the motor.
OVC control
Overvoltage control was activated by
[2] Enabled
in
parameter 2-17 Over-voltage Control
. The connected motor is
supplying 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
off
(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.
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 1.5 kHz if
parameter 14-55 Output Filter
is set to
[2]
Sine-Wave Filter Fixed
. Otherwise, the switching frequency is reduced to 1.0 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
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 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 has been given, but the motor is stopped until a run permissive signal is received via digital
input.
Running
The drive is driving the motor.
Sleep mode
The energy-saving function is enabled. This function being enabled means that now the motor has stopped, but
that it restarts automatically when required.
Speed high
The motor speed is above the value set in
parameter 4-53 Warning Speed High
.
AQ357954340588en-000201 / 130R0881
120 | Danfoss A/S © 2020.09
Maintenance, Diagnostics, and
Troubleshooting
VLT® Refrigeration Drive FC 103
Operating Guide