Lenze 8615E - Manual (Page 120)

118
List of fault indications
Display on
keypad Display on
host Fault Cause Remedy
--- 0 no fault
OC1 11 Short circuit/
˝Earth fault Short circuit/earth fault at the
motor side e.g. by
- defective motor cable
- contact of motor windings
- contact between motor
housing and winding Check motor cable for short-
circuit
Separate motor cable from
inverter and check insulation
between U-V-W and PE
Check motor
OC5 15 Inverter
overload Frequent or too long
accelerations with overcurrent
Permanent overload with motor
current > 110% rated current.
The permissible output power
was reduced to 12 or 16 kHz by
increasing the chopping
frequency
Check dimensioning of the drive
If necessary, set I
⋅
t monitoring
(C119, C120) to increased or
maximum permanent power
(observe ambient temperature)
Check setting of the chopping
frequency (C018)
OC6 16 Motor overload Thermal overlaod of the motor,
caused by e.g.
- non-permissible continuous
current
- frequent or too long
accelerations
Check dimensioning of the drive
Enter correct motor size (C086),
if necessary, switch off
monitoring (C119, C120)
OH 50 Overheat
heatsink Heatsink too hot, e.g. because,
- Ambient temperature too high
- Heatsink strongly polluted
- Incorrect mounting
Allow inverter to cool and
ensure a better ventilation
- Check ambient temperature in
the control cabinet
- Clean heatsink
- Change mounting
OH3 53 Overheat PTC
input Motor is overheated
PTC connecting cable
interrupted
PTC input open Check dimensioning of the drive
Check PTC connection
Bridge PTC input
CEO 61 Communication
error 0 Supply of automation module
switched off or defective
Connection to automation
module interrupted Check supply
Check connecting cable
U15 70
±
15-V supply
defective
Overload/Short-circuit at
terminal 20
±
15-V supply defective
Check load at terminal 20
Return inverter to factory
CCr 71 System failure Strong interferences on control
cables
PE loops in the wiring Screen control cables
Check PE wiring and GND
Pr 72 Parameter
reset After mains connection a
modified software version was
found.
Factory settings were loaded
automatically. Set desired parameters and
save under C003.
Pr1...Pr4 72 Parameter
reset When parameter sets 1 to 4
were loaded, a fault was found.
Factory settings were loaded
automatically. Set desired parameters and
save under C003.
PEr 74 Program error Contact factory
EER 91 External fault Signal via digital input "fault
indication"
Incorrect programming of the
input "fault indication" Check external feedback source
Check programming of the input
"fault indication"