Danfoss FC 300 Design Manual page 192

10. Troubleshooting
There is a discharge from the output phases
to ground, either in the cable between the ad-
justable frequency drive and the motor or in
the motor itself.
Turn off the adjustable frequency drive and
remove the ground fault.
ALARM 15, Incomplete hardware:
A fitted option is not handled by the present
control board (hardware or software).
ALARM 16, Short-circuit
There is a short-circuit in the motor or on the
motor terminals.
Turn off the adjustable frequency drive and
remove the short-circuit.
WARNING/ALARM 17, Control word
timeout:
There is no communication to the adjustable
frequency drive.
The warning will only be active when par. 8-04
is NOT set to
If par. 8-04 is set to
appears and the adjustable frequency drive
ramps down until it trips, while giving an
alarm.
par. 8-03
possibly be increased.
WARNING 23, Internal fan fault:
10
The fan warning function is an extra protec-
tion function that checks if the fan is running/
mounted. The fan warning can be disabled in
Fan Monitor
WARNING 24, External fan fault:
The fan warning function is an extra protec-
tion function that checks if the fan is running/
mounted. The fan warning can be disabled in
Fan Monitor
WARNING 25, Brake resistor short-
circuited:
The brake resistor is monitored during opera-
tion. If it short-circuits, the brake function is
disconnected and the warning appears. The
adjustable frequency drive still works, but
without the brake function. Turn off the ad-
justable frequency drive and replace the brake
resistor (see par. 2-15
ALARM/WARNING 26, Brake resistor
power limit:
The power transmitted to the brake resistor is
calculated as a percentage, as a mean value
over the last 120 s based on the resistance
192
OFF
.
Stop Trip
and , a warning
Control word Timeout Time
, par. 14-53, (set to [0] Disabled).
, par. 14-53, (set to [0] Disabled).
Brake Check
).
MG.33.B9.22 - VLT
value of the brake resistor (par. 2-11) and the
intermediate circuit voltage. The warning is
active when the dissipated braking energy is
higher than 90%. If
in par. 2-13, the adjustable frequency drive
cuts out and issues this alarm when the dissi-
pated braking energy is higher than 100%.
ALARM/ WARNING 27, Brake chopper
fault:
The brake transistor is monitored during op-
eration, and if it short-circuits, the brake func-
tion disconnects and the warning is issued.
The adjustable frequency drive is still able to
run, but since the brake transistor has short-
circuited, substantial power is transmitted to
the brake resistor, even if it is inactive.
Turn off the adjustable frequency drive and
remove the brake resistor.
This alarm/warning could also occur if the
brake resistor overheats. Terminal 104 to 106
are available as brake resistor. Klixon inputs,
see section Brake Resistor Temperature
Switch.
Warning: There is a risk of sub-
stantial power being transmit-
could
ted to the brake resistor if the
brake transistor is short-circuit-
ed.
ALARM/WARNING
failed:
Brake resistor fault: the brake resistor is not
connected/working.
ALARM 29, Drive overtemperature:
If the enclosure is IP 20 or IP 21/Type 1, the
cut-out temperature of the heatsink is 203
+5 o F [95 o C +5 o
cannot be reset until the temperature of the
heatsink is below 158
The fault could be a result of:
- Ambient temperature too high
- Motor cable too long
ALARM 30, Motor phase U missing:
Motor phase U between the adjustable fre-
quency drive and the motor is missing.
Turn off the adjustable frequency drive and
check motor phase U.
ALARM 31, Motor phase V missing:
® is a registered Danfoss trademark.
FC 300 Design Guide
Trip
[2] has been selected
28, Brake check
o
F
C]. The temperature fault
o C +5 o F [70 o C +5 o C].