Maintenance; Defaults-Causes-Remedies - Wilo MVIE Série Notice De Montage Et De Mise En Service

- Start again the pump.
- If necessary (particularly if the suction height exceeds 5 m) repeat
these operations.
- If water leaks at draining plug (it means the pump delivers its pressure),
slowly open the discharge valve.
- The pump has to be primed.
- Check pressure stability at discharge with a manometer, if instability,
perfect air draining.
- In case of failure, do the filling in again and start the operation again.
- To perfect air draining, close the discharge valve and the draining plug,
then stop the pump 20s, start the pump again and open the draining
plug. Do it as long as air comes out.
- Open the discharge valve in order to have the wished working point.
- Check that the current input does not exceed the value indicated on
the identification pump plate.

7. Maintenance

Before any operation,
CAUTION !
switch off the pump(s).

8. Defaults-Causes-Remedies

Before carrying out any maintenance work, switch off the
pump and ensure that it cannot be switched on again by
unauthorised people.
Never carry out work on a running pump.
CAUTION !
INCIDENTS
8.1 THE PUMP IS
OVERLOADED
8.2 ELECTRICAL
INCIDENTS
8.3 THE MOTOR /
CONVERTER HEATS
-The "failure transfer" relay is active when the counter reaches 6 failures.
1) If the pump is completely stopped and an intervention on this one is
necessary, cut the supply ; correct the failure, switch on the supply
again.
CAUSES
a) The Ventilation of the converter
is uncertain :
b) The pump is obstructed
by foreign matters :
c) The pump is locked :
d) The fluid density is too important :
a) The supply of the converter is in
over-or under-voltage :
b) A supply phase is missing :
c) The converter or the motor is
in short-circuit :
a) The ventilation of the converter is uncertain :
b) The motor cooling is uncertain :
c) The pump is used in the ambient
temperature higher 40 °C :
No special maintenance in operation.
Keep the pump and the motor-converter perfectly clean.
In case of prolonged stopping, if there is no risk of frost, it is best not
to drain the pump.
The bearing holding the coupling and the motor bearings are lubricated
for their total lifetime and do not require any lubrication.
On pumps equipped with greaser under bearing box, see regreasing
instructions written on sticker put on it.
On other models, the bearing holding the coupling is lubricated for its
total lifetime.
It is recommended to grease the shaft end as well as the coupling
boring with a high adhering grease (type type D321R Molikote or 8191
Loctite for example) to facilitate any further diassembling.
The mechanical seal does not require any maintenance in operation. It
must never operate dry.
DEFECTS DETECTED BY THE SPEED VARIATOR
All incidents hereafter mentioned give rise to :
- The resting of the "available transfer" relay.
- The activation of the "failure transfer" relay when the maximum quan-
tity of defect is reached.
- ligthening of a red LED.
REMEDIES
a) Check that the cooling channel is not obstructed.
b) Dismantle the pump, replace the defective
components or clean.
c) Dismantle the pump, clean it and replace the
defective parts.
Possibly mechanical defect of the motor (bearings).
Clean all the pipework.
d) Limit the maximum loading point of the pump
according to the type of fluid.
a) Check the voltage at the converter terminals.
b) Check the supply.
c) Dismantle the motor-converter of the pump and
check it or replace it.
a) Check that the cooling channel is not obstructed
and that fans run correctly.
b) Clean the cooling ribs of the motor.
c) The motor / converter is foreseen to run at a
maximum ambient temperature of + 40 °C.
2) If the failure cause has been suppressed without cutting the conver-
ter supply ; the pump must start again after an impulse on the "reset"
button (See FIG. 4).
- If the defect is major, the action of an after-sales technician is required.
ENGLISH
MVIE 7004
MVIE 9503/2
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