Fault
number
Alarm/
Warning bit
number
Fault text
Warning
Alarm
Trip
locked
Cause of problem
18
42
Start failed
X
The speed has not been able to exceed
parameter 1-78 Compressor Start Min Speed [Hz]
during start
within the allowed time.
30
19
U phase loss
X
X
Motor phase U is missing. Check the phase. See
parameter 4-58 Missing Motor Phase Function
31
20
V phase loss
X
X
Motor phase V is missing. Check the phase. See
parameter 4-58 Missing Motor Phase Function
32
21
W phase loss
X
X
Motor phase W is missing. Check the phase. See
parameter 4-58 Missing Motor Phase Function
36
24
Mains failure
X
Supply voltage to the frequency converter is lost.
38
17
Internal fault
X
X
Contact the local Danfoss supplier.
44
28
Earth Fault
X
X
Discharge from output phases to ground, using the value of
parameter 15-31 InternalFaultReason
if possible.
46
33
Gate drive voltage
low
X
X
The supply on the power card is out of range.
47
23
Control Voltage
Fault
X
X
X
24 V DC may be overloaded.
50
43
AMA calibration
failed
X
AMA calibration failed
51
AMA check U
nom
and I
nom
X
Motor voltage, current and power configured wrong in
parameters.
52
AMA low I
nom
X
Motor current too low.
53
AMA motor too
large
X
Motor is too large for the AMA to be performed.
54
AMA motor too
small
X
Motor is too small for the AMA to be performed.
55
AMA parameter
out of range
X
Parameter values found is outside of the acceptable range.
56
AMA interrupted
X
The AMA is interrupted by user.
57
AMA time-out
X
The AMA takes too long time to complete.
58
15
AMA internal
X
Contact the local Danfoss supplier.
59
25
Current limit
X
X
The current is higher than the value in
60
12
External Interlock
X
External interlock has been activated. To resume normal
operation, apply 24 V DC to the terminal programmed for
external interlock and reset the frequency converter (via serial
communication, digital I/O, or by pressing [Off/Reset]).
69
1
Pwr. Card Temp
X
X
X
The temperature sensor on the power card is either too hot
or too cold.
80
29
Drive initialised
X
All parameter settings are initialized to default settings.
87
15
Auto DC Braking
X
The frequency converter is auto DC braking.
126
Motor Rotating
High back EMF voltage. Stop the rotor of the PM motor.
208
4 (in
ORM Fault
X
Running in hand mode with low speed for too long time
Table 4.1 Warnings and Alarms
Troubleshooting
Programming Guide
MG18P202
Danfoss A/S © 06/2019 All rights reserved.
67
4
4