Wilo DD-I, Installation And Operating Instructions Manual

Page: 164 / 196

en Faults, causes and remedies
164 WILO SE 2020-12
Code Type Fault Cause Remedy
4019
C Motor Overload Torque limit reached If the system exceeds the motor's torque limit dur-
ing the acceleration ramp, extend the time for the
acceleration ramp.
If the system exceeds the generator's torque limit
during the brake ramp, extend the time for the
brake ramp.
If the torque limit is reached during operation, in-
crease the torque limit. Make sure the system can
be operated with a higher torque, if necessary, con-
tact customer service.
Excessive motor current consumption, check oper-
ating conditions.
4019
C Motor Overload Excess current Disconnect the motor from the mains connection
and turn the shaft by hand. Contact customer ser-
vice if it is not possible to turn the shaft by hand.
Check the motor power/frequency converter con-
figuration. Contact customer service if the motor
power is too high.
Check parameters 1-20 to 1-25 in the frequency
converter for correct motor data and adapt if ne-
cessary.
4020
C Motor Overtemp. Thermal motor monitoring has
triggered. Motor overheated, check cooling and operating
conditions.
Check motor for mechanical overload.
Check thermal motor monitoring connection (fre-
quency converter: terminal 33 and terminal 50
(+10 VDC).
Check parameters 1-93 "Thermistor Source" in the
frequency converter if a thermal switch or thermis-
tor is used: Value must correspond to sensor wiring.
4022
C Motor Safe Stop Warn-
ing "Safe Torque Off" active. Check connection: 24 VDC must apply at terminal
37 of the frequency converter. A manual reset is re-
quired once the fault has been eliminated!
Installation in potentially explosive atmospheres:
Check switch-off parameters (thermal motor mon-
itoring, dry-running protection).
4024
C FC Overload Warning Temperature sensor of the perform-
ance card records excessive or in-
sufficient temperature. Check frequency converter ventilation.
4024
C FC Overload Warning Switch-off temperature (75 °C) of
the control card reached. Check frequency converter ventilation.
4024
C FC Overload Warning Inverter overload Compare rated current:
- Compare output current displayed at LCP with
rated current of the frequency converter
- Compare the output current displayed at the LCP
with measured motor current
Display thermal load on LCP and monitor value:
- If the frequency converter is operated
above the
permanent rated current, the counter increases.
- If the frequency converter is operated
below the
permanent rated current, the counter decreases.
Check parameters 1-20 to 1-25 in the frequency
converter for correct motor data and adapt if ne-
cessary.
4025
C FC Line Warning Mains connection: one phase is
missing Have the electrical connection at the frequency
converter checked by a qualified electrician.
Have the electrical connection at the motor
checked by a qualified electrician.