Fault
code
Fault Subcode
in T.14
Possible cause How to correct the fault
8 System fault S1 = Re-
served
• operation malfunction
• defective component
Reset the fault and start the drive again.
If the fault shows again, ask instructions from
the local distributor.
S2 = Re-
served
S3 = Re-
served
S4 = Re-
served
S5 = Re-
served
S6 = Re-
served
S7 =
Charging
switch
S8 = No
power to
driver card
S9 = Power
unit com-
munica-
tion (TX)
S10 = Pow-
er unit
communi-
cation
(Trip)
S11 = Pow-
er unit
comm.
(Measure-
ment)
9
(1)
Undervoltage
S1 = DC-
link too
low during
run
The DC-link voltage is lower than the
limits.
• too low a supply voltage
• AC drive internal fault
• a defective input fuse
• the external charge switch is not
closed
If there is a temporary supply voltage break,
reset the fault and start the drive again.
Do a check of the supply voltage. If the sup-
ply voltage is sufficient, there is an internal
fault.
Ask instructions from the local distributor.
S2 = No
data from
power unit
S3 = Un-
dervoltage
control su-
pervision
10
(1)
Input line su-
pervision
The input line phase is missing. Do a check of the supply voltage, the fuses,
and supply cable.
Specifications
Operating guide | VACON® NXS/NXP Air-cooled
DPD00910G | 163
Danfoss A/S © 2018.06
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