ALARM 16, Short-circuit:
There is short-circuiting in the motor or on the motor
terminals.
Turn off the frequency converter and remove the short-
circuit.
WARNING/ALARM 17, Control word timeout:
There is no communication to the frequency converter.
The warning will only be active when
8-04 Control Timeout
Function
is NOT set to
[0] OFF
.
If
8-04 Control Timeout Function
is set to
[5] Stop and Trip
, a
warning appears and the frequency converter ramps down
until it trips, while giving an alarm.
8-03 Control Timeout Time
could possibly be increased.
Alarm 18, Start Failed
The speed has not been able to exceed Max Start Speed
(
1-77 Compressor Start Max Speed [RPM]
) during the start
within the allowed time (
1-79 Compressor Start Max Time to
Trip
). This may be caused by a blocked rotor.
Warning/ Alarm 19, Discharge Temperature High
Warning:
The discharge temperature exceeds the level programmed
in
28-24 Warning Level
. If so programmed in the frequency
converter lowers the speed of the compressor in an
attempt to lower the discharge temperature.
Alarm:
The discharge temperature exceeds the level programmed
in
28-26 Emergency Level
.
WARNING 25, Brake resistor short-circuited:
The brake resistor is monitored during operation. If it
short-circuits, the brake function is disconnected and the
warning appears. The frequency converter still works, but
without the brake function. Turn off the frequency
converter and replace the brake resistor (see
2-15 Brake
Check
).
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, on the
basis of the resistance value of the brake resistor
(
2-11 Brake Resistor (ohm)
) and the intermediate circuit
voltage. The warning is active when the dissipated braking
power is higher than 90%. If
[2] Trip
has been selected in
2-13 Brake Power Monitoring
, the frequency converter cuts
out and issues this alarm, when the dissipated braking
power is higher than 100%.
WARNING 27, Brake chopper fault:
The brake transistor is monitored during operation and if it
short-circuits, the brake function disconnects and the
warning comes up. The frequency converter 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 frequency converter and
remove the brake resistor.
NOTE
Warning: There is a risk of substantial power being
transmitted to the brake resistor if the brake transistor is
short-circuited.
ALARM/WARNING 28, Brake check failed:
Brake resistor fault: the brake resistor is not connected/
working.
ALARM 29, Frequency converter over temperature:
If the enclosure is IP20 or IP21/TYPE 1, the cut-out
temperature of the heat-sink is 95
°
C
±
5
°
C, dependent on
size of frequency converter. The temperature fault cannot
be reset, until the temperature of the heatsink is below 70
°
C
±
5
°
C.
The fault could be:
-
Ambient temperature too high
-
Too long motor cable
ALARM 30, Motor phase U missing:
Motor phase U between the frequency converter and the
the motor is missing.
Turn off the frequency converter and check motor phase
U.
ALARM 31, Motor phase V missing:
Motor phase V between the frequency converter and the
motor is missing.
Turn off the frequency converter and check motor phase V.
ALARM 32, Motor phase W missing:
Motor phase W between the frequency converter and the
motor is missing.
Turn off the frequency converter and check motor phase
W.
ALARM 33, Inrush fault:
Too many power-ups have occurred within a short time
period. See
for the allowed
number of power-ups within one minute.
WARNING/ALARM 34, Fieldbus communication fault:
The fieldbus on the communication option card is not
working.
WARNING 35, Out of frequency range:
This warning is active if the output frequency has reached
4-52 Warning Speed Low
or
4-53 Warning Speed High
. If the
frequency converter is set to
[3] closed loop
in
1-00 Config-
uration Mode
, the warning is active in the display. If the
frequency converter is not in this mode bit 008000 Out of
frequency range
in extended status word is active but there
is no warning in the display.
ALARM 38, Internal fault:
Contact the local Danfoss supplier.
WARNING 47, 24 V supply low:
The external 24 V DC backup power supply may be
overloaded, otherwise contact the local Danfoss supplier.
WARNING 48, 1.8 V supply low:
Contact the local Danfoss supplier.
General Specifications and ...
VLT
®
Refrigeration Drive Design Guide
MG16G102 - VLT
®
is a registered Danfoss trademark
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