Danfoss VLT HVAC Drive FC 102 Operating Manual page 133

VLT® HVAC Drive FC 102
Operating Guide
Operation Description
status
Current The drive output current is above the limit set in parameter 4-51 Warning Current High.
high
Current low The drive output current is below the limit set in parameter 4-52 Warning Speed Low.
DC hold DC hold is selected in parameter 1-80 Function at Stop and a stop command is active. The motor is held by a DC
current set in parameter 2-00 DC Hold Current.
DC stop The motor is held with a DC current (parameter 2-01 DC Brake Current) for a specified time (parameter 2-02 DC Brak-
ing Time).
• DC brake is activated in parameter 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 corre-
sponding terminal is not active.
• The DC brake is activated via serial communication.
Feedback
The sum of all active feedback is above the feedback limit set in parameter 4-57 Warning Feedback High.
high
Feedback
The sum of all active feedback is below the feedback limit set in parameter 4-56 Warning Feedback Low.
low
Freeze out- The remote reference is active, which holds the present speed.
put
•
[20] Freeze Output was 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 functions speed up and speed
down.
• Hold ramp is activated via serial communication.
Freeze out- A freeze output command has been given, but the motor remains stopped until a run permissive signal is re-
put request 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 (For drives with a 24 V external supply installed only.) Mains supply to the drive is removed, but the control card is
off supplied by the external 24 V.
Protection Protection mode is active. The unit has detected a critical status (an overcurrent or overvoltage).
md
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Maintenance, Diagnostics, and
Troubleshooting
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