No.
Description
Warning
Alarm
Trip lock
Cause
49
Speed limit
–
X
–
The motor speed is below the specified limit in
parameter 1-87 Trip Speed Low [Hz]
.
50
AMA calibration failed
–
X
–
A calibration error has occurred.
51
AMA check U
nom
and I
nom
–
X
–
Wrong setting for motor voltage and/or motor current.
52
AMA low I
nom
–
X
–
Motor current is too low. Check the settings.
53
AMA big motor
–
X
–
The power size of the motor is too large for the AMA to
operate.
54
AMA small motor
–
X
–
The power size of the motor is too small for the AMA to
operate.
55
AMA parameter range
–
X
–
The parameter values of the motor are outside of the
acceptable range. AMA does not run.
56
AMA interrupt
–
X
–
The AMA is interrupted.
57
AMA timeout
–
X
–
–
58
AMA internal
–
X
–
Contact Danfoss.
59
Current limit
X
X
–
Frequency converter overload.
60
External interlock
–
X
–
External interlock has been activated.
61
Encoder loss
X
X
–
–
63
Mechanical brake low
–
X
–
The actual motor current has not exceeded the release
brake current within the start delay time window.
65
Control card temp
X
X
X
The cutout temperature of the control card has exceeded
the upper limit.
67
Option change
–
X
–
A new option is detected or a mounted option is
removed.
68
Safe Torque Off
2)
X
X
–
STO is activated. If STO is in manual restart mode
(default), to resume normal operation, apply 24 V DC to
terminals 37 and 38, and initiate a reset signal (via
fieldbus, digital I/O, or [Reset]/[Off Reset] key). If STO is in
automatic restart mode, applying 24 V DC to terminals 37
and 38 automatically resumes the frequency converter to
normal operation.
69
Power card temp
X
X
X
The cutout temperature of the power card has exceeded
the upper limit.
80
Drive initialized to default value
–
X
–
All parameter settings are initialized to default settings.
87
Auto DC braking
X
–
–
Occurs in IT mains when the frequency converter coasts,
and the DC voltage is higher than 830 V for 400 V units
and 425 V for 200 V units. The motor consumes energy
on the DC link. This function can be enabled/disabled in
parameter 0-07 Auto DC Braking
.
88
Option detection
–
X
X
The option is removed successfully.
95
Broken belt
X
X
–
–
99
Locked rotor
–
X
–
Rotor is blocked.
120
Position control fault
–
X
–
–
126
Motor rotating
–
X
–
PM motor is rotating when AMA is performed.
127
Back EMF too high
X
–
–
The back EMF of PM motor is too high before starting.
188
STO internal fault
2)
–
X
–
24 V DC supply is connected to only 1 of the 2 STO
terminals (37 and 38), or a failure in STO channels is
detected. Ensure that both terminals are powered by a
24 V DC supply, and that the discrepancy between the
signals at the 2 terminals is less than 12 ms. If the fault
still occurs, contact the local Danfoss supplier.
nw
run
Not while running
–
–
–
Parameters can only be changed when the motor is
stopped.
Maintenance, Diagnostics, a...
VLT
®
Midi Drive FC 280
48
Danfoss A/S © 10/2017 All rights reserved.
MG07A402
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