Danfoss VLT FC 102 Operating Instructions Manual page 35

Diagnostics and Troubleshoo...
DC Stop The motor is held with a DC current (2-01 DC
Brake Current) for a specified time (2-02 DC
Braking Time).
•
DC Brake is activated in 2-03 DC Brake Cut
In Speed [RPM] and a stop command is
active.
•
DC Brake (inverse) is selected as a function
for a digital input (parameter group 5-1*
Digital Inputs). The corresponding terminal
is not active.
•
The DC Brake is activated via serial
communication.
Feedback high The sum of all active feedbacks is above the
feedback limit set in 4-57 Warning Feedback
High.
Feedback low The sum of all active feedbacks is below the
feedback limit set in 4-56 Warning Feedback
Low.
Freeze output The remote reference is active, which holds
the present speed.
•
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 has been given,
request but the motor will remain stopped until a run
permissive signal is received.
Freeze ref. Freeze Reference was chosen 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 has been 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
3-19 Jog Speed [RPM].
•
Jog was selected as function for a digital
input (parameter group 5-1* Digital Inputs).
The corresponding terminal (e.g. 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 (e.g. No
signal). The monitoring function is active.
®
VLT HVAC Drive Operating Instructions
Motor check
OVC control
PowerUnit Off
Protection md
QStop
Ramping
Ref. high
Ref. low
Run on ref.
Run request
Running
MG11AJ02 - Rev. 2013-07-31
In 1-80 Function at Stop, 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.
Overvoltage control was activated in 2-17 Over-
voltage Control, [2] Enabled. The connected
motor is supplying 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.
(Only frequency converters with an external
24 V power supply installed).
Mains supply to the frequency converter is
removed, but the control card is supplied by
the external 24 V.
Protection mode is active. The unit has
detected a critical status (an 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
14-26 Trip Delay at Inverter Fault
The motor is decelerating using 3-81 Quick
Stop Ramp Time.
•
Quick stop inverse was chosen 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 4-55 Warning Reference
High.
The sum of all active references is below the
reference limit set in 4-54 Warning Reference
Low.
The frequency converter is running in the
reference range. The feedback value matches
the setpoint value.
A start command has been given, but the
motor is stopped until a run permissive signal
is received via digital input.
The motor is driven by the frequency
converter.
7 7
33