Danfoss VLT CDS 803 Operating Guide

5 Troubleshooting
5.1 Acoustic Noise or Vibration
If the compressor is making noise or vibrations at certain frequencies, set the speed bypass parameters in parameter 4-6* Speed Bypass.
5.2 List of Warnings and Alarms
Table 18: Warnings and Alarms
Fault
num‐
ber
Alarm/
warning
bit num‐
ber
Fault text Warn‐
ing
Alarm Trip
lock
Cause of problem
2 16 Live zero error X X – Signal on terminal 53 or 54 is less than 50% of the value
set in parameter 6-10 Terminal 53 Low Voltage, parameter
6-12 Terminal 53 Low Current, parameter 6-20 Terminal 54
Low Voltage, or parameter 6-22 Terminal 54 Low Current.
See also parameter group 6-0* Analog I/O Mode.
3 No motor – X – The motor is not connected properly to the drive.
4 14 Mains ph. loss X X X Missing phase on the supply side or too high voltage im-
balance. Check the supply voltage. See parameter 14-12
Function at Mains Imbalance.
7 11 DC over volt X X – DC-link voltage exceeds the limit.
8 10 DC under volt X X – DC-link voltage drops below voltage warning low-limit.
9 9 Inverter over-
load
X X – More than 100% load for a long time.
10 8 Motor ETR over X X – For 6.0–10 kW (8.0–15 hp) drives: The motor is too hot
due to more than 100% load for a long time. See parame-
ter 1-90 Motor Thermal Protection.For 18.5–30 kW (22–
40 hp) drives: Parameter 1-90 Motor Thermal Protection is
disabled. Alarm 10 is used for compressor overload.
11 7 Motor th over X X – Thermistor or thermistor connection is disconnected. See
parameter 1-90 Motor Thermal Protection.
13 5 Over Current X X X Inverter peak current limit is exceeded.
14 2 Earth Fault – X X Discharge from output phases to ground.
16 12 Short Circuit – X X Short circuit in motor or on motor terminals.
17 4 Ctrl. word TO X X – No communication to drive. See parameter group 8-0*
General Settings.
24 50 Fan Fault X X – The heat sink cooling fan is not working (only on 400 V,
30 kW (40 hp) units).
30 19 U phase loss – X X Motor phase U is missing. Check the phase.
31 20 V phase loss – X X Motor phase V is missing. Check the phase.
32 21 W phase loss – X X Motor phase W is missing. Check the phase.
38 17 Internal fault – X X Contact the local Danfoss supplier.
Troubleshooting
Operating Guide | VLT® Compressor Drive CDS 803
AQ321748767627en-000101 / 130R0570
40 | Danfoss A/S © 2019.12

Danfoss VLT CDS 803 Specifications

General

Brand	Danfoss
Model	VLT CDS 803
Category	DC Drives
Language	English