Danfoss VLT HVAC Basic Drive FC 101 Informações Técnicas descarregar pdf (Página 79)

Display the Thermal Drive Load on the LCP and

monitor the value. When running above the drive

continuous current rating, the counter should

increase. When running below the drive

continuous current rating, the counter should

decrease.

NOTE

See the derating section in the Design Guide for more details

if a high switching frequency is required.

WARNING/ALARM 10, Motor overload temperature

According to the electronic thermal protection (ETR), the

motor is too hot. Select whether the frequency converter

gives a warning or an alarm when the counter reaches 100%

in 1-90 Motor Thermal Protection. The fault is that the motor is

overloaded by more than 100% for too long.

Troubleshooting:

Check if motor is over heating.

If the motor is mechanically overloaded

That the motor 1-24 Motor Current is set correctly.

Motor data in parameters 1-20 through 1-25 are set

correctly.

Run AMA in 1-29 Automatic Motor Adaption (AMA).

WARNING/ALARM 11, Motor thermistor over temp

The thermistor or the thermistor connection is disconnected.

Select whether the frequency converter gives a warning or

an alarm in 1-90 Motor Thermal Protection.

Troubleshooting:

Check if motor is over heating.

Check if the motor is mechanically overloaded.

Check that the thermistor is connected correctly.

If using a thermal switch or thermistor, check the

programming of 1-93 Thermistor Source matches

sensor wiring.

WARNING/ALARM 13, Over current

The inverter peak current limit is exceeded. The warning lasts

about 1.5 sec., then the frequency converter trips and issues

an alarm.

Troubleshooting:

This fault may be caused by shock loading or fast

acceleration with high inertia loads.

Turn off the frequency converter. Check if the

motor shaft can be turned.

Check that the motor size matches the frequency

converter.

Incorrect motor data in parameters 1-20 through

1-25.

ALARM 14, Earth (ground) 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.

Troubleshooting:

Turn off the frequency converter and remove the

earth fault.

Measure the resistance to ground of the motor

leads and the motor with a megohmmeter to check

for earth faults in the motor.

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 OFF.

If 8-04 Control Timeout Function is set to Stop and Trip, a

warning appears and the frequency converter ramps down

until it trips, while giving an alarm.

Troubleshooting:

Check connections on the serial communication

cable.

Increase 8-03 Control Timeout Time

Check operation of the communication equipment.

Verify proper installation based on EMC

requirements.

WARNING 24, 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).

Troubleshooting:

Check fan resistance.

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.

Troubleshooting VLT HVAC Basic Drive Programming Guide

78 MG.18.B1.02 - VLT

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