Recommissioning; Disposal; Maintenance And Repair; Troubleshooting And Possible Solutions - Wilo Sub TWU 3 HS Serie Einbau- Und Betriebsanleitung

MAINTENANCE AND REPAIR

7.2.1. Removal
In the case of vertical installation, disassembly
takes place in the same way as installation:
• Disassemble the well cover.
• Dismantle the ascending pipe and unit in the
reverse order to installation.
When configuring and selecting the lifting
equipment, note that during dismantling, the
entire weight of the piping, the pump (including
the power supply cable) and the water column
has to be lifted.
In the case of horizontal installation, the tank/
reservoir has to be drained completely. Thereaf-
ter the pump can be released from the discharge
pipeline and disassembled.
7.2.2. Return delivery/storage
For shipping, the parts must be packed and sealed
in sufficiently large, non-tearing plastic sacks to
prevent leakages. The parts may only be shipped
by forwarding agents who have been instructed
appropriately.
Please also refer to the "Transport and storage"
section.

7.3. Recommissioning

Before recommissioning, the submersible pump
must be cleaned of contaminants.
The submersible pump can then be installed
and put into operation in accordance with the
specifications in this operating and maintenance
manual.
The submersible pump may only be switched on
again if it is in proper working order.

7.4. Disposal

7.4.1. Lubricants
Oils and lubricants must be collected in appropri-
ate containers and properly disposed of in terms
of EC Directive 75/439/EEC as well as in compli-
ance with the provisions of sections 5a and 5b
of the German Waste Act or the applicable local
laws.
Water-glycol mixtures are categorised in wa-
ter-polluting class 1 according to VwVwS 1999.
When disposing of the unit, adhere to DIN 52 900
(for propanediol and propylene glycol) and/or
local guidelines.
7.4.2. Protective clothing
Protective clothing worn for cleaning and main-
tenance work is to be disposed of in accordance
with the German Waste Code TA 524 02 and EC
Directive 91/689/EEC.
7.4.3. Product
Proper disposal of this product avoids damage to
the environment and risks to personal health.
• Use the services of public or private waste dis-
posal companies, or consult them for the disposal
of the product or parts thereof.
Installation and operating instructions Wilo-Sub TWU 3/High Speed
• For more information on proper disposal, please
contact your local council or waste disposal office
or the supplier from whom you obtained the
product.
8. Maintenance and repair
The motor is filled with food-safe white oil that
is potentially biodegradable. This motor filling is
used to lubricate the motor bearing and cool the
motor winding. Accordingly, there is no need to
carry out any maintenance work.
Any repairs to the motor or the frequency con-
verter or replacement of the motor filling must be
carried out by Wilo customer service only.

9. Troubleshooting and possible solutions

In order to prevent damage or serious injury when
repairing malfunctions on the unit, the following
points must always be observed:
• Only repair a malfunction if qualified personnel
are available for this work, i.e. the individual tasks
must be carried out by trained specialists. For ex-
ample, electrical work must be performed by an
electrician.
• Always secure the unit against an accidental
restart by disconnecting it from the mains. Take
appropriate precautions.
• Always have a second person on hand to ensure
the unit is switched off in an emergency.
• Secure moving parts to prevent injury.
• Unsanctioned modifications to the unit are made
at the operator's own risk and release the manu-
facturer from any warranty obligations.
9.1. Alarm signals on the display of the external
frequency converter ("HS-ECP" version)
Fig. 11.: Alarm signals
1 Dry running
2 Severe leakage
3 Inverter error
The alarm signals must always be confirmed by
pressing the "Reset" button on the frequency
converter. The display also has to be confirmed
for errors that cause the system to automatical-
ly restart via the auto reset function. This is to
ensure that the user is properly informed.
1. Dry run: displayed if the system is switched off
due to low water. If the "auto reset function" is
activated, the system is automatically restarted
after the set interval.
Severe leakage: displayed if the system starts
2.
frequently at brief intervals. In this case, there is
probably a leak in the system. Reactivation is only
possible once the fault has been eliminated.
Before confirming, check that there is no leak-
age in the system. Frequent starts can damage
the pump.
4 Short-circuit
5 Overload
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