KRAL CLC 55, Руководство по эксплуатации, Страница: 33 / 38

Operating Instructions OIC 12en Edition 08/2016 33
Troubleshooting
Troubleshooting
11 Viscosity of the liquid too low ► Decrease the temperature of the liquid
- or -
► Increase the rotation speed.
12 Airlock or gas in the liquid ► Test the pipe system for air admission and replace
parts if necessary.
► Reduce the suction head
- or -
► Increase the inlet pressure.
13 Motor running at wrong voltage or
frequency ► Ensure that the motor voltage and frequency match
the operating voltage.
► Compare the speed of the motor with the pump
rating plate. If the data do not match, adjust the
speed of the motor.
14 Advanced wear of rotating pump
components ► Check screw set and housing and replace if
necessary.
15 Advanced wear of sealing surfaces ► Replace the seal and check the pumped liquid for
abrasive content.
16 Inadequate alignment of
shaft coupling ► Align the shaft coupling correctly, see "Assembling
the pump and motor", page 16.
17 Pump deflected ► Support the weight of the pipe system.
► Loosen pipe connections and mount stress-free, see
"Connecting the pump to the pipe system", page 16.
18 Resonance in the system ► Provide a flexible bearing arrangement for the pump
unit
- or -
► Make the connections with hoses.
19 Speed of flow in suction or pressure
line too high ► Set the flow speed in the suction line so that it does
not exceed 1 m/s.
► Set the flow speed in the pressure line so that it does
not exceed 3 m/s.
20 Ball bearing damaged ► Replace the ball bearing.
21 Lack of lubrication or foreign bodies
have caused superficial damage to
rotating pump components ► Check the screw set and the housing. If necessary
replace the pump with free shaft end.
22 Shaft seal damaged through dry
running ► Replace the shaft seal. When starting up the pump,
pay attention to venting.
23 Inlet pressure too high ► Reduce the inlet pressure at the system side.
24 Thermal or chemical loading of
elastomer seals exceeded ► Check the maximum operating temperature.
► Check the resistance of the elastomers with regard
to the pumped liquid.
25 Cold start when delivering high-
viscosity liquids ► Install the heating system.
26 Seal overload during heating
process ► To prevent thermal expansion of the liquid causing a
build-up of pressure, open the pressure- or suction-
side shut-off device.
No. Cause Remedy