Fault Diagnosis - Lenze 7812 Technical Description

6/fa checked: 19.04.89
ET4
Function code 28
The tunction code 28 allows tor an automatic connection ot the
inverter after a short—time inains tailure.
main s
L1, L2,L3
FWD(REV)
motor
speed
The trequency inverter adapts its rotatlonal tield trequency
to
the speed ot the idling motor and then connects the motor
after subsequent reconnection ot the xnains. The drive then
accelerates to its set—value, tollowing the set acceleration
ramp.
Data code:
8. Fault diaqnosis
the inverters sets
lt
is given in the tollowing table.
Display
Err
Err
Oc
QC
OC
GMJ
LU
OL
CL
The displays
OCl,
or earth circult of the motor terminals U, V, W.
FIJ
: Funotion inactive
: Function active
04
the type ot fault is displayed. The coding
TRIP,
Type ot tault
0-perating fault
1
3
Controller tailure
Overcurrent during acceleration
1
Overcurrent during deceleration
2
Overcurrent at constant speed
3
Overvo ltage
Undervoltage
Inverter overtemperature „TI-flV' or
1
external temDerature switch
(ezterrial
Motor
7
and 0C3 may also indicate a short—circuit
0C2
MB 33.0831 GB
release)
TRL?
ov'~rloir~
page: 27
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