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8.4
Operation
Faults of electronic devices due to electromagnetic fields
Electromagnetic fields are created during the operation of pumps with frequency con-
verter. Interference of electronic devices may be the result. The result may be a device
malfunction, which can result in damage to the health or even death, e.g. of persons car-
rying implanted active or passive medical devices. Therefore, during operation the pres-
ence of any persons e.g. with cardiac pacemakers in the vicinity of the unit/pump should
be prohibited. With magnetic or electronic data media, the loss of data is possible.
8.5
Decommissioning
The pump must be decommissioned before conducting maintenance, repair or disman-
tling work on the system.
DANGER! Risk of fatal injury!
There is a risk of fatal injury from electric shock when working on electrical equip-
ment.
• Have work on the electrical part of the pump carried out only by a qualified electrician
as a basic principle.
• Before starting any maintenance and repair work on the system, disconnect the pump
from the power supply, and make sure it cannot be switched back on by unauthorised
persons.
• Work on the pump may only be started after 5 minutes have elapsed due to the dan-
gerous residual contact voltage.
• Check whether all connections (including potential-free contacts) are voltage-free.
• The pump may still be live even in voltage-free state. The drive rotor induces a dan-
gerous contact voltage at the motor contacts.
Close the shut-off devices in front of and behind the pump.
• If the control module/cable is damaged, do not operate the pump.
WARNING! Risk of burns!
Touching the pump can cause burns!
Depending on the pump or system operating conditions (fluid temperature), the entire
pump can become very hot.
Allow the installation and pump to cool to room temperature.
9 Maintenance
Before carrying out maintenance / cleaning and repair work, observe chapters 8.4
"Operation", 8.5 "Decommissioning" and 9.1 "Dismantling/installation".
The safety instructions in Chapter 2.6 and Chapter 7 must be complied with.
After completing maintenance and repair work, install and connect the pump according to
chapter 7 "Installation and electrical connection". Switch on the pump according to chap-
ter 8 "Commissioning".
34
WILO SE 05/2017
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