Troubleshooting; Acoustic Noise Or Vibration; Warnings And Alarms; Additional Resources - Danfoss VLT Compressor Drive CDS 803 Guia De Funcionamiento

VLT® Compressor Drive CDS 803
Operating Guide

5 Troubleshooting

5.1 Acoustic Noise or Vibration

If the compressor application makes noise or vibrations at certain frequencies, adjust the following parameters to avoid resonance
problems within the system.
• Upper and lower frequency limits, Parameter group 4-6* Speed Bypass.
•
Switching pattern and switching frequency, parameter group 14-0* Inverter Switching.

5.2 Warnings and Alarms

A warning or an alarm is signaled by the relevant indicator on the front of the drive and indicated by a code on the display.
A warning remains active until its cause is no longer present. Under certain circumstances, operation of the compressor may still be
continued. Warning messages may be critical.
In the event of an alarm, the drive has tripped. To restart operation, reset alarms once their cause has been rectified.
This may be done in 4 ways:
• By pressing [Reset].
• Via a digital input with the Reset function.
• Via serial communication.
•
By resetting automatically using the [Auto Reset] function, see parameter 14-20 Reset Mode.
A trip is the action following an alarm. The trip coasts the compressor and is reset by pressing [Reset] or by a digital input (parameter
group 5-1* Digital Inputs). The original event that caused an alarm cannot damage the drive or cause dangerous conditions. A trip
lock is an action when an alarm occurs, which could damage the drive or connected parts. A trip lock situation can only be reset by
cycling power.
Refer to the VLT® Compressor Drive CDS 803 Programming Guide listed in
gramming.
Table 10: Indicator Lights
Status
Warning
Alarm
The alarm words, warning words and extended status words can be read out via serial bus or optional fieldbus for diagnosis. See
also parameter 16-90 Alarm Word, parameter 16-92 Warning Word, and parameter 16-94 Ext. Status Word.
MOTOR RESTART
After a manual reset pressing [Reset], press [Auto On] or [Hand On] to restart the motor.
If an alarm cannot be reset, the reason may be that its cause has not been rectified, or the alarm is trip-locked, see
ALARM RESET
Alarms that are trip-locked offer extra protection, meaning that the mains supply must be switched off before the alarm can be
reset. After being switched back on, the drive is no longer blocked and may be reset as described above once the cause has been
rectified.
Alarms that are not trip-locked can also be reset using the automatic reset function in parameter 14-20 Reset Mode (Warning: auto-
matic wake-up is possible!) Table 11
alarm for a given fault.
30 | Danfoss A/S © 2021.06
Color
Constant yellow light
Flashing red light
N O T I C E
C A U T I O N
specifies whether a warning occurs before an alarm, or whether to show a warning or an

1.1.2 Additional Resources

for parameter details and pro-
AQ32174876762701-000301 / 130R0627
Troubleshooting
Table 11.