Lenze 8615E - Manual (Page 121)

119
2 Warning
A warning is displayed automatically under C067. During a warning
the signal "ready" is removed, however, the operation of the
frequency inverter is not interrupted.
Reset of the warning: Press SH + PRG
or
activate the input TRIP reset.
List of warnings
Display on
keypad Display on
host Fault Cause Remedy
W51 203 Overheat PTC
input Motor is overheated
PTC connecting cable
interrupted
PTC input open
Check dimensioning of the drive
Check PTC connection
W91 241 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"
3 Monitoring
A monitoring indication causes a pulse inhibit and is displayed on
the keypad.The keys are out of order. Pulse inhibit is automatically
reset when the DC bus voltage has reached again its permissible
vlaue.
List of monitoring indications
Display on
keypad Fault Cause Remedy
LU Low voltage Mains voltage is too low Check mains voltage
OU Overvoltage Mains voltage is too high
˝
Creeping earth fault on the motor
side
Check mains voltage
Increase deceleration times,
when using a brake chopper,
check dimensioning and
connection of the brake resistor,
increase deceleration times
Check motor cable and motor for
earth fault (disconnect motor and
inverter)