Wilo ISAR MODH1 Series, Инструкция по установке и эксплуатации

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14
Fault Cause Remedy
Current consumption too high Non-return valve leaking Check and replace the seal or non-return
valve if necessary
Flow rate too high Check the pump data and default values and
correct if necessary
Turn-to-turn fault in the motor Check, if necessary replace motor or have it
repaired
Mains voltage: a phase is missing Check the fuses, cables and connections
Motor protection switch triggers Non-return valve defective Check and replace the non-return valve if
necessary
Flow rate too high Check the pump data and default values and
correct if necessary
Contactor defective Check it and replace it if necessary
Turn-to-turn fault in the motor Check, if necessary replace motor or have it
repaired
Mains voltage: a phase is missing Check the fuses, cables and connections
Pump(s) produce(s) no or too little power Major fluctuations of the inlet pressure Check the inlet pressure and take measures to
stabilise the inlet pressure if necessary
(e.g. pressure reducers)
Inlet pipe clogged or shut off Check the inlet pipe and remove the clogging
or open the shut-off valve if
necessary
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 clogged 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
Pump(s) produce(s) no or too little power Non-return valve clogged Check and remove the clogging or replace
the non-return valve if necessary
Gate valve in the system closed or not
sufficiently open
Check and open the shut-off valve
completely if necessary
Low-water level switch has been
triggered
Check the inlet pressure and the level in the
break tank
Incorrect direction of rotation of the
motors
Check direction of rotation and correct by
changing over phases if necessary
Turn-to-turn fault in the motor Check, if necessary replace motor or have it
repaired
Dry-running protection switches off
although water is present
Major fluctuations of the inlet pressure Check the inlet pressure and take measures to
stabilise the inlet pressure if necessary
(e.g. pressure reducers)
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
Electrodes connected incorrectly or
supply pressure switch set incorrectly
Check the pump data and default values and
correct if necessary
Low water switch defective Check and, if necessary, replace the low
water switch
Dry-running protection does not switch
off, although water low
Electrodes connected incorrectly or pressure
for low water cut-out switch set incorrectly
Check installation and setting and correct as
required
Low water switch defective Check and, if necessary, replace the low
water switch
You can find information on pump or control device faults not dealt with here in the attached documentation for the components concerned.
If the operating fault cannot be resolved, contact a Wilo customer service department.