9

￿ ￿        

Fault tracing

89(96)

fault can be reset with the Reset button on the control keypad or via the I/O terminal. The faults are stored in the Fault history menu (H5) which can be browsed. The different fault codes you will find in the table below.

The fault codes, their causes and correcting actions are presented in the table below. The shadowed faults are A faults only. The items written in white on black background present faults for which you can program different responses in the application. See parameter group Protections.

 

 

 

 

 

 

 

 

 

 

Fault

 

Fault

 

 

Possible cause

 

Correcting measures

 

code

 

 

 

 

 

 

 

 

1

Overcurrent

Frequency converter has detected too

 

Check loading.

 

 

 

 

high a current (>4*In) in the motor cable:

 

Check motor size.

 

 

 

 

sudden heavy load increase

 

Check cables.

 

 

 

 

short circuit in motor cables

 

 

 

 

 

 

unsuitable motor

 

 

 

2

Overvoltage

The DC-link voltage has exceeded the

 

Make the deceleration time longer.

 

 

 

 

limits defined in.

 

 

 

 

 

 

too short a deceleration time

 

 

 

 

 

 

high overvoltage spikes in utility

 

 

 

3

Earth fault

Current measurement has detected that

 

Check motor cables and motor.

 

 

 

 

the sum of motor phase current is not

 

 

 

 

 

 

zero.

 

 

 

 

 

 

insulation failure in cables or motor

 

 

 

8

System fault

 

 

component failure

 

Reset the fault and restart.

 

 

 

 

 

 

 

Should the fault re-occur, contact the

 

 

 

 

 

 

faulty operation

 

 

 

 

 

-

 

distributor near to you.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

9

Undervoltage

DC-link voltage is under the voltage limits

 

In case of temporary supply voltage

 

 

 

 

defined in.

 

break reset the fault and restart the

 

 

 

 

most probable cause: too low a

 

frequency converter. Check the supply

 

 

 

 

 

 

supply voltage

 

voltage. If it is adequate, an internal

 

 

 

 

frequency converter internal fault

 

failure has occurred.

 

 

 

 

 

 

 

 

Contact the distributor near to you.

 

 

 

 

 

 

 

 

 

11

Output phase

Current measurement has detected that

 

Check motor cable and motor.

 

 

supervision

there is no current in one motor phase.

 

 

 

13

Frequency

Heatsink temperature is under –10°C

 

 

 

 

converter under

 

 

 

 

 

 

 

temperature

 

 

 

 

 

 

14

Frequency

Heatsink temperature is over 90°C.

 

Check the correct amount and flow of

 

 

converter

 

 

 

 

cooling air.

 

 

overtemperature

Overtemperature warning is issued when

 

Check the heatsink for dust.

 

 

 

 

 

 

°

 

Check the ambient temperature.

 

 

 

 

the heatsink temperature exceeds 85 C.

 

Make sure that the switching frequency

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

is not too high in relation to ambient

 

 

 

 

 

 

 

 

temperature and motor load.

 

15

Motor stalled

Motor stall protection has tripped.

 

Check motor.

 

 

 

 

 

 

 

 

Check that Pump or Fan is not blocked.

 

16

Motor

Motor overheating has been detected by

 

Decrease the motor load.

 

 

overtemperature

frequency converter motor temperature

 

If no motor overload exists, check the

 

 

 

 

model. Motor is overloaded.

 

temperature model parameters.

Page 89
Image 89
Honeywell NXL user manual Fault tracing 8996, Fault Possible cause Correcting measures Code

NXL specifications

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