Xylem LOWARA SMB /SVE Series, Инструкция по установке, эксплуатации и обслуживанию

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en
– Original instructions
25
7 Troubleshooting
Precautions
WARNING:

Faults must be corrected by a technician possessing the technical-professional requirements
outlined in the current regulations

Observe the safety requirements in the chapters on Use and Operation and Maintenance

If a fault cannot be corrected or is not mentioned, contact Xylem or the Authorised Distributor.
The frequency converter saves the last alarms that have occurred. Refer to the instructions on
use of the frequency converter for the types of fault and how to check the last alarms that have
occurred.
7.1 The booster set is off
Cause Remedy
Power supply cut off Restore the power supply
Switch in OFF position Turn the switch ON
7.2 Motor does not start
Cause Remedy
Power supply cut off Restore the power supply
The thermal overload protection of
the motor has been triggered Eliminate the fault and reset the switch
Motor (coil) faulty Check and repair or replace the motor
7.3 Frequent start-ups and stops
Cause Remedy
Diaphragm pressure tank faulty Repair or replace the diaphragm pressure tank
Incorrect pre-charge of the
diaphragm pressure tank Set the new pressure pre-charge value according to the pump unit and
setpoint
The pre-charge value of the
diaphragm pressure tank is at zero The diaphragm pressure tank must be pre-charged
7.4 The speed of the pump unit increases and decreases without
stopping and without consumption of water (utility closed)
Cause Remedy
Loss of water from the non-return
valve Check the hydraulic system and the valve
The diaphragm pressure tank is
damaged or undersized Repair or replace the diaphragm pressure tank