Maintenance; Faults, Causes And Remedies - Wilo -Isar BOOST5 Installation And Operating Instructions Manual

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9

Maintenance

10

Faults, causes and remedies

Fault
The control panel does not light up LEDs turned off
Pump does not start
Low water alarm
Short-circuit alarm
Low voltage alarm
20
Continuous green LED + flashing red LED
Inspection and cleaning of non-return valve (Fig. 8)
• After lowering the system pressure, unscrew and remove the filler screw.
• Remove the non-return valve unit by unscrewing the fastening screw.
• Inspect and clean it.
• Reinstall the non-return valve unit. Make sure it is oriented correctly.
• Screw the filler screw back on properly.
Inspection and cleaning of non-return valve (Fig. 9)
• Lower the system pressure.
• Remove the cover and fork.
• Remove the bent connection.
• Extract the non-return valve.
• Check and clean it.
• Replace the non-return valve in its housing correctly.
• Reattach the bent connection, as well as the cover and fork.
WARNING
Risk of electric shock
Danger from electrical current must be eliminated. Ensure that the
pump's power supply is switched off and secured against unauthorised
reactivation before performing any electrical work.
LED signal
Red LED continuously lit
Flashing red LED
Green LED continuously lit
Flashing red LED, flashing green
LEDs in position 1
Flashing red LED, continuous green
LEDs in position 1.
Flashing red LED, flashing green
LEDs in position 5.
Example Pump in alarm state due to short-circuit
LED 1 continuous + flashing red LED =
short-circuit
Remedy
Check that the side switch is set to "I".
Check the presence of mains power supply and conformity of the
residual-current device.
Switch on the pump by pressing the "I/O" button.
See the list of alarm codes in Section 8
System pressure does not fall below the set working pressure.
Check for water at the suction side.
Ensure the suction is not obstructed.
Fill and prime the pump.
Check the pump is not blocked by opening the plug at the back
of the motor and turning the shaft
Check that the cable, plug and socket are intact and there are no
leakages
Voltage is more than 15 % lower than value indicated on signal
plate. Stabilise voltage to keep it within the limits ±15%.
Installation and operating instructions • Wilo-Isar BOOST5 • Ed.03/12/2022