Troubleshooting; Precautions; The Pump Unit Is Turned On But Does Not Work; The Differential Protection Device (Rcd) Is Activated - Xylem Bell & Gossett e-80SCXL Series Instruction Manual

7 Troubleshooting

7 Troubleshooting

7.1 Precautions

WARNING:
Maintenance and service must be performed by skilled and qualified personnel only.

7.2 The pump unit is turned on but does not work

Cause
Power supply cut off
The thermal overload protection of the motor has
been triggered
The device that detects the absence of liquid or
minimum pressure has been triggered
Power supply cable is damaged
The condenser is faulty, if present
Control panel is faulty
Motor (coil) faulty

7.3 The differential protection device (RCD) is activated

Cause
Motor leaking
Unsuitable type of differential
7.4 The thermal overload protection of the motor is triggered when the
pump unit starts
Cause
It is calibrated at a value too low in relation to the
rated current of the motor
Missing power supply phase
Loose and/or faulty connections of the thermal
overload protection
Loose and/or incorrect and/or fault (star-delta)
connections in the terminal board of the motor
Motor (coil) faulty
Pump unit mechanically seized up
Power supply cable is damaged
Check valve faulty
Foot check valve faulty
28
Remedy
Restore the power supply
Reset the thermal overload protection in the control
panel or the one in the pump unit
Top up the liquid or restore minimum pressure
Replace the power supply cable
Replace the condenser
Check and repair or replace the control panel
Check and repair or replace the motor
Remedy
Check and repair or replace the motor
Check the type of differential
Remedy
Recalibrate
Check the power supply and restore the phase
Tighten or replace the clamps and terminals
Tighten or replace the clamps and terminals
Check and repair or replace the motor
Check and repair the pump unit
Replace the power supply cable
Replace the check valve
Replace the foot check valve
Series e-80SCXL INSTRUCTION MANUAL