FAULT TRACING
vacon • 79
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1
Real time record
If real time is set to run on the frequency converter the data items T1 and T2 will appear as follows:
T.1
Date
yyyy-mm-dd
T.2
Time
hh:mm:ss,
sss
Note: When contacting your Vacon partner because of a fault condition, always write down all texts
and codes on the keypad display before.
10.2
Fault codes
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.
Note: When contacting distributor or factory because of a fault condition, always write down all texts
and codes on the keypad display.
Fault
code
Fault
Possible cause
Correcting measures
1
Overcurrent
Frequency converter has detected too
high a current (>4*I
H
) in the motor
cable:
−
sudden heavy load increase
−
short circuit in motor cables
−
unsuitable motor
Subcode in T.14:
S1 = Hardware trip
S2 = Current cutter supervision (NXS)
S3 = Current controller supervision
Check loading.
Check motor.
Check cables.
2
Overvoltage
The DC-link voltage has exceeded the
limits defined in Table 4-3.
−
too short a deceleration time
−
high overvoltage spikes in supply
Subcode in T.14:
S1 = Hardware trip
S2 = Overvoltage control supervision
Make the deceleration time longer. Use
brake chopper or brake resistor (avail-
able as options)
3
Earth fault
Current measurement has detected that
the sum of motor phase current is not
zero.
−
insulation failure in cables or motor
Check motor cables and motor.
5
Charging
switch
The charging switch is open, when the
START command has been given.
−
faulty operation
−
component failure
Reset the fault and restart.
Should the fault re-occur, contact your
local distributor.Please visit:
http://www.vacon.com/wwcontacts.html
6
Emergency
stop
Stop signal has been given from the
option board.
Check emergency stop circuit
7
Saturation trip
Various causes:
−
defective component
−
brake resistor short-circuit or
overload
Cannot be reset from the keypad.
Switch off power.
DO NOT RE-CONNECT POWER!
Contact your local distributor.
If this fault appears simultaneously with
Fault 1, check motor cables and motor