Spare Parts - Wilo Comfort Co R-Mvi Serie Manual Del Usuario

Fault
Pump(s) produces no or too little
power
Dry-running protection switches
off although water is present
Dry-running protection does not
switch off despite low water level
Rotation direction control lamp
on (not for all pump types)
You will 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, con-
tact a specialist technician or the Wilo customer
service department.
Installation and operating instructions Wilo-Comfort CO(R) .. MVI ... /.. MVIS ... /.. Helix V ... /.. Helix VE ...
Cause
Major fluctuations in the inlet pressure
Inlet pipe is blocked or shut off
Nominal diameter of the inlet pipe is too
small
Inlet pipe is installed incorrectly
Air in the inlet
Impellers are blocked
Non-return valve is leaking
Non-return valve is blocked
Gate valve in the system is closed or not
sufficiently open
Low water level indicated
Incorrect direction of rotation of the
motors
Turn-to-turn fault in the motor
Major fluctuations in the inlet pressure
Nominal diameter of the inlet pipe is too
small
Inlet pipe is installed incorrectly
Flow rate is too high
Electrodes connected incorrectly or sup-
ply pressure switch set incorrectly
Low water cut-out switch or pressure
sensor on the intake side is faulty
Electrodes connected incorrectly or sup-
ply pressure switch set incorrectly
Low water switch defective
Incorrect direction of rotation of the
motors
Remedy
Check the inlet pressure and take measures to
stabilise the inlet pressure if necessary (e.g.
pressure reducers).
Check the inlet pipe and remove the clogging or
open the shut-off device if necessary
Check the inlet pipe and increase the cross-sec-
tion of the inlet pipe if necessary
Check the inlet pipe and change the pipe routing
if necessary
Check and shut off the piping and vent the
pumps if necessary
Check the pump and replace it or have it
repaired if necessary
Check and replace the seal or non-return valve if
necessary
Check and remove the clogging or replace the
non-return valve if necessary
Check and open the shut-off device completely
if necessary
Check the inlet pressure and the level in the
break tank
Check direction of rotation and correct by
changing over phases if necessary
Check, if necessary replace motor or have it
repaired
Check the inlet pressure and take measures to
stabilise the inlet pressure if necessary (e.g.
pressure reducers).
Check the inlet pipe and increase the cross-sec-
tion of the inlet pipe if necessary
Check the inlet pipe and change the pipe routing
if necessary
Check the pump data and default values and
correct them if necessary
Check installation and setting and correct as
required
Check and, if necessary, replace the low water
switch or pressure sensor
Check installation and setting and correct as
required
Check and, if necessary, replace the low water
switch
Check direction of rotation and correct by
changing over phases if necessary

11 Spare parts

Spare parts or repairs may be ordered from local
specialist technicians and/or the Wilo after-sales
service.
To avoid queries and order errors, please supply all
data on the rating plate with every order.
Subject to change without prior notice!
English
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