Lenze EVF8212-EV020 - Page 81

Troubleshooting and fault elimination
821XKlimaBA0399 8-3
Display RemedyCauseFault
H05 Internal fault Contact Lenze
LU Undervoltage DC-bus voltage too low - Check mains voltage
- Check supply module
OC1 Short circuit
Short circuit Find out cause of short circuit; check
cable
Excessive capacitive charging
current of the motor cable
Use motor cable which is shorter or of
lower capacitance
OC2 Earth fault
Grounded motor phase Check motor; check cable
O
C
2
E
a
r
t
h
f
a
u
l
t
Excessive capacitive charging
current of the motor cable
Use motor cable which is shorter or of
lower capacitance
OC3 Overload inverter
during acceleration or
s
h
o
r
t
c
i
r
c
u
i
t
Acceleration time too short (C012) - Increase acceleration time
- Check drive selection
d
u
r
i
n
g
a
c
c
e
l
e
r
a
t
i
o
n
o
r
short circuit
Defective motor cable Check wiring
Interturn fault in the motor Check motor
OC4 Overload controller
during deceleration
Deceleration time too short (C013) - Increase deceleration time
- Check the selection of the brake
resistor or connect the brake chopper
OC5 Ixtoverload Frequent and too long acceleration
processes with overcurrent
Check drive dimensioning
OC6 Overload motor
Motoris thermally overloaded, for
instance, because of
- impermissible continuous
current
- Check drive selection
- frequent or too long acceleration
processes
- Check the setting under C120
OH Heat sink temperature
is higher than the value
set in the controller
Ambient temperature
T
u
>+40  Cor+50  C
- Allow controller to cool and ensure
ventilation
- Check the ambient temperature in the
control cabinet
Heat sink very dirty Cleanheat sink
Incorrect mounting position Change mounting position
OH3 PTC monitoring
Motortoohot because of
excessive current or frequent and
too long acceleration
Check drive dimensioning
PTC not connected Connect PTC or switch-off monitoring
(C0585=3)
OH4 Overtemperature unit Inside unit too hot - Reduce controller load
- Improve cooling
- Check fan in the controller
OU Overvoltage
Mains voltage too high Check voltage supply
O
U
O
v
e
r
v
o
l
t
a
g
e
Feedback operation
Braking operation
- Increase deceleration times.
- For operation with brake choppers:
- Check the selection and connection
of the brake resistor
- Increase the deceleration times
Earth leakage on the motorside Check motor cable and motor for earth
fault (disconnect motor from inverter)
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