Fault
num‐
ber
Alarm/
warning
bit num‐
ber
Fault text Warn‐
ing
Alarm Trip
lock
Cause of problem
80 29 Drive initialised – X – All parameter settings are initialized to default settings.
87 47 Auto DC Brak-
ing
X – – The drive is auto DC braking.
95 40 Broken Belt X X – Torque is below the torque level set for no load, indicat-
ing a broken belt. See parameter group 22-6* Broken Belt
Detection.
99 Locked rotor – X – The rotor is locked or the load is too high.
126 – Motor Rotating – X – High back EMF voltage. Stop the rotor of the PM motor.
200 – Fire Mode X – – Fire mode has been activated.
202 – Fire Mode Lim-
its Exceeded
X – – Fire mode has suppressed 1 or more warranty voiding
alarms.
250 – New spare part – X X The power or switch mode power supply has been ex-
changed. Contact the local Danfoss supplier.
251 – New Typecode – X X The drive has a new type code. Contact the local Danfoss
supplier.
Troubleshooting
Operating Guide | VLT® Compressor Drive CDS 803
AQ321748767627en-000101 / 130R0570
42 | Danfoss A/S © 2019.12
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