Danfoss VLT FC 103 Programming Manual page 197

Troubleshooting
WARNING/ALARM 13, Over Current
The inverter peak current limit (approx. 200% of the rated
current) is exceeded. The warning will last approx. 8-12 s,
then the frequency converter trips and issues an alarm.
Turn off the frequency converter and check if the motor
shaft can be turned and if the motor size matches the
frequency converter.
ALARM 14, Earth fault
There is a discharge from the output phases to earth,
either in the cable between the frequency converter and
the motor or in the motor itself.
5 5
Turn off the frequency converter and remove the earth
fault.
ALARM 15, In-complete hardware
A fitted option is not handled by the present control board
(hardware or software).
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
to zero speed, 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 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 19, Discharge Temperature High
The discharge temperature exceeds the level programmed
in 28-24 Warning Level. If so programmed in 28-25 Warning
Action the frequency converter lowers the speed of the
compressor in an attempt to lower the discharge
temperature.
ALARM 19, Discharge Temperature High
The discharge temperature exceeds the level programmed
in 28-26 Emergency Level.
WARNING 23, Internal fans
External fans have failed due to defect hardware or fans
not mounted.
WARNING 24, External fan fault
The fan warning function is an extra protection function
that checks if the fan is running/mounted. The fan warning
can be disabled in 14-53 Fan Monitor, [0] Disabled.
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
196
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VLT Refrigeration Drive Programming Guide
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/ALARM 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.
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.
WARNING/ALARM 29, Drive over temperature
If the enclosure is IP00, IP20/Nema 1 or IP21/TYPE 1, the
cut-out temperature of the heat-sink is 95 °C +5 °C. The
temperature fault cannot be reset, until the temperature of
the heatsink is below 70 °C.
The fault could be
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ALARM 30, Motor phase U missing
Motor phase U between the frequency converter and 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.
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MG16H102 - VLT is a registered Danfoss trademark
Ambient temperature too high
Too long motor cable