Manual

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
AQ275641848264en-000101 / 132R0078| 63
Danfoss A/S © 2019.11