Xylem HYDROVAR (HV2.1 - 3.45) - Manual (Page 66)

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