5 Operation
5.1 Precautions
In case of coexistence of two or more of the following conditions:
• high ambient temperature
• high water temperature
• duty points insisting on unit maximum power
• persisting undervoltage of mains,
the life of the unit may be jeopardized and/or derating may occur: for further information
contact Xylem or the Authorised Distributor.
5.2 Wait times
Electrical Hazard:
Contact with electric components may cause death, even after the unit has been switched
off. Before any interventions on the unit, the network voltage and any other input voltages
must be disconnected for the minimum time indicated in Table 9.
Table 9: Wait times
Smart motor
Minimum waiting time in minutes
4
5
Electrical Hazard:
Frequency converters contain DC-link capacitors that can remain charged even when the
frequency converter is not powered.
To avoid electrical hazards:
• Disconnect the AC power supply
• Disconnect all types of permanent magnet motors
• Disconnect all DC-link remote power supplies, including the battery backups, the
Uninterrupted Power Supply units and the DC-link connections to other frequency
converters
• Wait for the capacitors to discharge completely before carrying out any maintenance
or repairs; see Table 9 (Wait times)for the waiting times
5 Operation
Smart Pump Range INSTRUCTION MANUAL
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