Instruction Book
110
9828 0934 73
3220
DC link
undervoltage
Intermediate circuit DC voltage is
not sufficient because of a missing
supply phase, blown fuse or fault in
the rectifier bridge
Check supply cabling, fuses and
switchgear.
Check that the supply voltage matches the
nominal input voltage of the drive.
3381
Output phase loss
Motor circuit fault due to missing
motor connection (all three phases
are not connected).
Connect motor cable.
5080
Fan
Cooling fan feedback missing.
Check auxiliary fan(s) and connection(s).
Replace fan if faulty.
Make sure the front cover of the drive is in
place and tightened.
Reboot the control unit.
5081
Auxiliary fan
broken
An auxiliary cooling fan (connected
to the fan connectors on the control
unit) is stuck or disconnected.
Check auxiliary fan(s) and connection(s).
Replace fan if faulty.
Make sure the front cover of the drive is in
place and tightened.
Reboot the control unit.
5090
STO hardware
failure
STO hardware diagnostics has
detected hardware failure.
Replace the drive
5091
Safe torque off
Programmable
fault: 31.22 STO
indication run/stop
Safe torque off function is active, i.e.
safety circuit signal(s) connected to
connector STO is broken during
start or run.
Check safety circuit connections.
6681
EFB comm loss
Communication break in embedded
fieldbus (EFB) communication.
Check if controller is working properly.
Check if fieldbus cable 2X22 that is
properly connected to controller.
Check if fieldbus cable is not damaged and
properly connected to the drive (see
service diagram).
7310
Overspeed
Motor is turning faster than highest
allowed speed due to incorrectly set
minimum/maximum speed
Re-program the drive with the correct
refrigerant compressor (i.e. DNB22).
Reference resistance
Refrigerant compressor model
Resistance (Ω) - Amb. Temp. 20°C
DNB 22
2,71
