en ā Original Instructions
e-SHE, e-SHS
ā Additional Installation, Operation and Maintenance Instructions 33
7 Troubleshooting
7.1 Precautions
WARNING:
Maintenance must be done by a technician possessing the technical
-professional requ
irements
outlined in the current regulations.
WARNING:
Observe the safety instructions given in
Use and operation and Maintenance.
WARNING:
If a fault cannot be corrected or is not mentioned, contact Xylem or the Authorised Distributor.
7.2 The unit does not start
The thermal overload protection of the motor has been triggered
Reset the thermal overload protection on the control panel
or the unit
The device that detects the absence of liquid or minimum pressure has
been triggered
Top up the liquid or restore minimum pressure
The capacitor, if present, is faulty
Check and repair or replace the control panel
Check and repair or replace the motor
7.3 The differential protection device (RCD) is activated
Check and repair or replace the motor
Unsuitable type of differential
Check the type of differential
7.4 The thermal overload protection triggers or the fuses trip
The motor thermal overload protection triggers or the fuses trip when the unit starts.
It is calibrated at a value too low in relation to the rated current of the motor
Missing power supply phase
Check the power supply and restore the phase
Loose and/or faulty connections of the thermal overload protection
Tighten or replace the clamps and terminals
Loose and/or incorrect and/or faulty (star-delta) connections in the terminal
board of the motor
Tighten or replace the clamps and terminals
Check and repair or replace the motor
Pump unit mechanically seized
Check and repair the pump unit
Replace the foot check valve
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