No. Description Warning Alarm Trip lock Cause
49 Speed limit – X –
The motor speed is below the specied 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 O
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
eldbus, digital I/O, or [Reset]/[O 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
88
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