Operating instructions

No. Description W A T Cause of Problem
50 AMT not possible X Either R
S
value is outside permitted limits, or
motor current is too low on at least one phase,
or the motor is too small for AMA.
51 AMT fault re. nameplate da-
ta (AMT TYPE.DATA FAULT)
X Inconsistency between registered motor data.
54 AMT wrong motor (AMT
WRONG MOTOR)
X AMA has detected a missing motor phase.
55 AMT timeout (AMT TIME-
OUT)
X Calculations are taking too long, probably
caused by noise on motor cables.
56 AMT warning during AMT
(AMT WARN. DURING AMT)
X Warning is given while AMA is performed.
99 Locked (LOCKED) X See par. 018.
W: Warning, A: Alarm, T: Trip locked
A warning or an alarm will appear in the display as a numerical code Err. xx. A warning will be
shown on the display until the fault has been corrected, while an alarm will continue to flash until
the [STOP/RESET] key is activated.The table shows the various warnings and alarms, and whether
the fault locks the frequency converter. After a
Trip locked the mains supply is cut off and the
fault is corrected. The mains supply is reconnected and the frequency converter is reset. The
frequency converter is now ready. A
Trip can be reset manually in three ways:
1. Via the operating key [STOP/RESET].
2. Via a digital input.
3. Via serial communication.
It is also possible to choose an automatic reset in parameter 405
Reset function . When a cross
appears in both warning and alarm, this can mean that a warning comes before an alarm. It can
also mean that it is possible for the user to programme whether a warning or an alarm will appear
for a given fault. For example, this is possible in parameter 128
Motor thermal protection . After a
trip the motor will coast, and alarm and warning will blink on the frequency converter, but if the
fault disappears only the alarm will blink. After a reset the frequency converter will be ready to
start operation again.
VLT 2800 Quick Guide 1 Quick Guide
MG.28.M1.02 - VLT
®
is a registered Danfoss trademark 27
1
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