Quick Reference Guide
DF5 Frequency Inverter
02/02 AWB8230-1447GB
4
Fault messages
When an overcurrent, overvoltage or undervoltage occurs, the
output of the DF5 frequency inverter is disabled to protect the DF5
from damage. The connected motor then coasts to a stop. The
inverter remains in this condition until the fault message is
acknowledged with the OFF key or the RST input.
Display
Cause
Description
E 01
Overcurrent in the output stage in
static operation
If the output current reaches an excessive level, the output voltage is switched off. This happens
when
• the frequency inverter’s output is short-circuited,
• the motor is blocked,
• an excessive load is suddenly applied to the output.
E 02
Overcurrent in the output stage
during deceleration
E 03
Overcurrent in the output stage
during acceleration
E 04
Overcurrent in the output stage at
standstill
E 05
Overload
The internal electronic motor protection has switched off the output voltage because the motor was
overloaded.
E 07
Overvoltage
The output voltage has been switched off because the motor was operating regeneratively.
E 08
EEPROM fault
If the program memory does not operate reliably due to radio frequency interference or excessive
temperature, the output voltage is switched off.
If the supply voltage is switched off while the RST input is active, an EEPROM fault occurs when the
supply voltage is reapplied.
E 09
Undervoltage
If the DC voltage is too low, the output voltage is switched off (fault-free function of electronics no
longer possible; any problems, such as overheating of motor and insufficient torque).
E 11
Processor malfunction
The processor does not operate correctly. The output voltage is switched off.
E 12
External fault message
The output voltage is switched off due to an external fault message which is present on a digital
input configured as an EXT input.
E 13
Restart inhibit activated
The mains voltage was switched on or an intermittent interruption in the supply voltage has occurred
while unattended start protection (input USP) was active.
E 14
Earth fault
Earth faults between the U, V or W terminals and earth are being reliably detected. A protective
circuit prevents destruction of the frequency inverter, but does not protect the operating personnel.
E 15
Mains overvoltage
If the supply voltage is higher than permitted, the output voltage is switched off 100 seconds after
the voltage supply has been switched on.
E 21
Overtemperature
If the temperature sensor installed in the power section records an operating temperature above the
permissible limit value, the output voltage is switched off.
E 22
Processor malfunction
The processor does not operate correctly. The output voltage is switched off.
E 35
PTC fault signal
If the resistance of the external PTC thermistor connected to the PTC input (digital input configured
as a PTC thermistor input) is too high, the output voltage is switched off.
