66
Motor overheat
PTC in the conduit box has
reached its release
temperature
•
close X1/8 - 9 if there is no PTC
available (e.g. submersible pumps)
•
no proper motor cooling
•
outside temperature too high
•
MOTOR OVERLOAD
•
check star/delta connection
Inverter overheat
too high temperature inside
the HYDROVAR
•
no proper cooling
•
contamination of the motor vents
•
ambient temperature too high
Over voltage
DC voltage of the
HYDROVAR too high
•
Parameter Ramp 2 too fast
•
Power supply too high
•
Voltage peaks too high
(Solution: Line filters, Line
inductance, RC-Element)
Under voltage
DC voltage of the
HYDROVAR too low
•
supply voltage too low
•
phase failure at the input
•
asymmetry of the Phases
Overloaded
(shown on the display, but
HYDROVAR keeps on
running)
Power limit of the
HYDROVAR is reached
•
check Parameter settings, and
operation point of the motor
•
input power too high
•
check characteristics of the
HYDROVAR
Overload
Power limit of the
HYDROVAR is exceeded
•
check Parameter Ramp 1/2 (too
short) and BOOST (too low)
•
check motor connection
(star/delta) and cable
•
Pump blocked
•
Motor turns in the wrong direction
before running
(Non return-valve defect)
•
Not allowed operation point or
Parameter Max. frequency too high
•
check Parameter BOOST in the
menu MANUAL TEST RUN
Output short
Current rise at the output
too high
•
check connection-terminals of the
HYDROVAR
•
check the connection-terminal of
the motor
•
check the motor-cable
•
check the windings of the motor
Act. Value Sensor
Data signal on terminals
X1/2<4mA
•
ACTUAL VALUE signal (pressure
transducer) faulty
•
wrong connection
•
Sensor (Transducer) fault
•
faulty Transducer cable
