Danfoss Vacon NXP Series Operating Manual page 164

Operating guide | VACON® NXS/NXP Air-cooled
Fault Fault
code
Output phase
11 (1)
supervision
12 Brake chopper
supervision
13 Frequency
converter un-
dertempera-
ture
14 Frequency
converter
overtempera-
ture
Motor stalled
15 (1)
Motor over-
16 (1)
temperature
Motor under-
17 (1)
load
Unbalance
18 (2)
22 EEPROM
checksum fault
Counter fault
(2)
24
25 Microproces-
sor watchdog
fault
164 | Danfoss A/S © 2018.06
Subcode Possible cause
in T.14
The measurement of current tells that
there is no current in 1 motor phase.
There is no brake resistor. The brake re-
sistor is broken. A defective brake
chopper.
Too low a temperature in the heat sink
of the power unit or in the power
board. The heat sink temperature is be-
low -10 °C (14 °F).
heat sink temperature is over 90 °C
(194 °F) (or 77 ºC (170.6 °F), NX_6, FR6).
Overtemperature alarm is issued when
the heat sink temperature goes over
85 °C (185 °F) (72 ºC (161.6 °F)).
The motor stalled.
There is too heavy a load on the motor.
Motor underload protection has trip-
ped.
S1 = Cur- Unbalance between power modules in
rent unbal- paralleled power units.
ance
S2 = DC
voltage
unbalance
Parameter save fault.
• operation malfunction
• defective component
Values that showed on the counters
are incorrect
• operation malfunction
• defective component
How to correct the fault
Do a check of the motor cable and the motor.
Do a check of the brake resistor and the ca-
bling.
If they are in good condition, there is a fault
in the resistor or the brake chopper. Ask in-
structions from the local distributor.
Do a check of the actual amount and flow of
cooling air.
Examine the heat sink for dust.
Do a check of the ambient temperature.
Make sure that the switching frequency is
not too high in relation to the ambient tem-
perature and the motor load.
Do a check of the motor and the load.
Decrease the motor load. If there is no motor
overload, do a check of the temperature
model parameters.
Do a check of the load.
If the fault occurs again, ask instructions from
the local distributor.
If the fault occurs again, ask instructions from
the local distributor.
Reset the fault and start the drive again.
If the fault shows again, ask instructions from
the local distributor.
Specifications
DPD00910G