Danfoss VLT HVAC Operating Instructions Manual page 40

4. Electrical installation
Unsuccessful AMA
1.
2.
4
Step 4. Set speed limit and ramp time
Set up the desired limits for speed and ramp
time.
Minimum Reference
Maximum Reference
40
The frequency converter enters into alarm mode. A description of the alarm can be found
in the Troubleshooting section.
"Report Value" in the [Alarm Log] shows the last measuring sequence carried out by the
AMA, before the frequency converter entered alarm mode. This number along with the
description of the alarm will assist troubleshooting. If contacting Danfoss Service, make
sure to mention number and alarm description.
NB!
Unsuccessful AMA is often caused by incorrectly entered motor name plate data or
too big difference between the motor power size and the frequency converter power
size.
par. 3-02
par. 3-03
MG.11.A4.02 - 09.10.06. VLT
®
VLT HVAC Drive Operating Instructions
Motor Speed Low Limit par. 4-11 or 4-12
Motor Speed High Lim- par. 4-13 or 4-14
it
Ramp-up Time 1 [s] par. 3-41
Ramp-down Time 1 [s] par. 3-42
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