Installation and operating instructions Wilo-Sub TWU 3-...-HS (High Speed) 23
MAINTENANCE AND REPAIR English
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 water
tank/reservoir has to be drained completely.
Thereafter the pump can be released from the
discharge pipeline and disassembled.
7.2.2
Return delivery / storage
For shipping, the parts must be packed in tear-
proof plastic bags of sufficient size in such a
manner that they are tightly sealed and leak-
proof. The parts may only be shipped by forward-
ing agents who have been instructed appropri-
ately.
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 Oils and lubricants
Operating fluid must be collected in suitable
tanks and disposed off in accordance with the
locally applicable guidelines.
7.4.2 Protective clothing
Used protective clothing must be disposed off in
accordance with the locally applicable guidelines.
7.4.3 Information on the collection of used electrical
and electronic products
Proper disposal and appropriate recycling of this
product prevents damage to the environment and
dangers to your personal health.
NOTICE:
Disposal in domestic waste is forbidden!
In the European Union, this symbol can appear
on the product, the packaging or the accompa-
nying documentation. It means that the electri-
cal and electronic products in question must not
be disposed of along with domestic waste.
To ensure proper handling, recycling and disposal
of the used products in question, please note the
following points:
• Only hand over these products at designated,
certified collecting points.
• Observe the locally applicable regulations!
Please consult your local municipality, the nearest
waste disposal site, or the dealer who sold the
product to you for information on proper disposal.
For further information on recycling, go to www.
wilo-recycling.com.
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 to property and seri-
ous injury when repairing malfunctions on the
unit, observe the following:
• Attempt to remedy a fault only if you have
qualified staff. This means that each job must
be carried out by trained qualified personnel, for
example, electrical work must be performed by a
trained electrician.
• Always secure the unit against an accidental
restart by disconnecting it from the mains. Take
appropriate safety 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)
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 automati-
