5 Warnings and Alarms
5.1 List of Warnings and Alarms
Table 19: Warnings and Alarms
Fault
num‐
ber
Alarm/
warning
bit num‐
ber
Fault text
Warn‐
ing
Alarm
Trip
locked
Cause of problem
2
16
Live zero er-
ror
X
X
–
Signal on terminal 53 or 54 is less than 50% of the value
set in
parameter 6-10 Terminal 53 Low Voltage
,
parameter
6-12 Terminal 53 Low Current
,
parameter 6-20 Terminal 54
Low Voltage
, or
parameter 6-22 Terminal 54 Low Current
.
See also
parameter group 6-0* Analog I/O Mode
.
4
14
Mains ph.
loss
X
X
X
Missing phase on the supply side or too high voltage im-
balance. Check the supply voltage. See
parameter 14-12
Function at Mains Imbalance
.
7
11
DC over volt
X
X
–
DC-link voltage exceeds the limit.
8
10
DC under volt
X
X
–
DC-link voltage drops below voltage warning low-limit.
9
9
Inverter over-
load
X
X
–
More than 100% load for a long time.
10
8
Motor ETR
over
X
X
–
Motor is too hot due to more than 100% load for a long
time. See
parameter 1-90 Motor Thermal Protection
.
11
7
Motor th over
X
X
–
Thermistor or thermistor connection is disconnected. See
parameter 1-90 Motor Thermal Protection
.
13
5
Over Current
X
X
X
Inverter peak current limit is exceeded.
14
2
Earth Fault
–
X
X
Discharge from output phases to ground.
16
12
Short Circuit
–
X
X
Short circuit in motor or on motor terminals.
17
4
Ctrl. word TO
X
X
–
No communication to drive. See
parameter group 8-0*
General Settings
.
24
50
Fan Fault
X
X
–
The heat sink cooling fan is not working (only on 400 V,
30–90 kW units).
30
19
U phase loss
–
X
X
Motor phase U is missing. Check the phase. See
parame-
ter 4-58 Missing Motor Phase Function
.
31
20
V phase loss
–
X
X
Motor phase V is missing. Check the phase. See
parame-
ter 4-58 Missing Motor Phase Function
.
32
21
W phase loss
–
X
X
Motor phase W is missing. Check the phase. See
parame-
ter 4-58 Missing Motor Phase Function
.
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
Control Volt-
age Fault
–
X
X
Control voltage is low. Contact the local Danfoss supplier.
Warnings and Alarms
Operating Guide | VLT® HVAC Basic Drive FC 101
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Danfoss A/S © 2019.11
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