Wilo Comfort-Vario COR-1***-/VR Series, Инструкция по установке и эксплуатации, Страница: 36 / 44

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44 WILO SE 07/2013
Fuse defective Check fuses and replace if necessary
Motor protection has triggered Check the default values against the pump
or motor data, measure the current values
and correct the setting if necessary. Check
the motor for defects and replace it if nec-
essary.
Contactor defective Check it and replace it if necessary.
Turn-to-turn fault in the motor Check, if necessary replace motor or have
repaired.
Pump does not shut down. Strongly fluctuating inlet pressure Check the inlet pressure and take measures
to stabilise the inlet pressure if necessary
(e.g. pressure reducers).
Intake pipe blocked or shut off Check the inlet pipe and remove the block-
age or open the shut-off device if neces-
sary.
Nominal diameter of the inlet pipe too
small Check the inlet pipe and increase the cross-
section of the inlet pipe if necessary.
Inlet pipe installed incorrectly Check the inlet pipe and change the pipe
routing if necessary.
Air in the inlet Check and shut off the piping and vent the
pumps if necessary.
Impellers blocked Check the pump and replace it or have it
repaired if necessary.
Non-return valve leaking Check and replace the seal or non-return
valve if necessary.
Non-return valve blocked Check and remove the blockage or replace
the non-return valve if necessary.
Gate valve in the system closed or not
sufficiently open Check and open the shut-off device com-
pletely if necessary.
Flow rate too high Check the pump data and default values
and correct them if necessary.
Shut-off device closed at pressure sensor Check and open the shut-off device if nec-
essary.
Switch-off pressure set too high Check the setting and correct it if neces-
sary.
Incorrect direction of rotation of the
motor Check the direction of rotation and repair or
replace the frequency converter module if
necessary.
Switching frequency too high or flut-
tering Major fluctuations of the inlet pressure Check the inlet pressure and take measures
to stabilise the inlet pressure if necessary
(e.g. pressure reducers).
Intake pipe blocked or shut off Check the inlet pipe and remove the block-
age or open the shut-off device if neces-
sary.
Nominal diameter of the inlet pipe too
small Check the inlet pipe and increase the cross-
section of the inlet pipe if necessary.
Inlet pipe installed incorrectly Check the inlet pipe and change the pipe
routing if necessary.
Shut-off device closed at pressure sensor Check and open the shut-off device if nec-
essary.
Incorrect supply pressure at diaphragm
pressure vessel Check the supply pressure and correct it if
necessary.
Valve at diaphragm pressure vessel
closed Check the valve and open it if necessary.
Switching difference set too low Check the setting and correct it if neces-
sary.
Pump not stable and/or making
unusual noises Major fluctuations of the inlet pressure Check the inlet pressure and take measures
to stabilise the inlet pressure if necessary
(e.g. pressure reducers).
Intake pipe blocked or shut off Check the inlet pipe and remove the block-
age or open the shut-off device if neces-
sary.
Fault Cause Remedy