Interruption of the liquid cooling circuit.

Check if the loop of the liquid cooling circuit is closed.

The liquid cooling circuit of the Light Processor Unit is mistakenly excluded from the main liquid cooling circuit.

Reconnect the cooling circuit of the Light Processor Unit with the pump and heat exchanger.

The pump of the water cooling is electrical disconnected.

Check if the wire unit (reference 1 image) of the pump is properly connected.

Blocked filter of the heat exchanger.

Replace the filter. See service manual chapter "Remove and clean both bottom dust filters".

No or insufficient liquid inside the cooling circuit. The pump is sucking air and sounds noisier then normal.

Fill the cooling circuit with liquid. See "Filling the liquid cooling circuit"

Malfunction pump of the cooling circuit. You don't feel any vibrations when touching the pump after activating the “Refill mode” via the Communicator software.

1. Check the electrical resistance of the pump winding. Replace the pump if infinite.

2. Drain the liquid cooling circuit, open the pump and check if the pump rotor is not blocked. If so, remove the rotor and clean the bearings of the pump. See service manual chapter "Replacement of the Pump".

Defect temperature sensor (Reference 2 image) on the water cooling block of the Light Pipe entrance.

Replace the temperature sensor on the Light Pipe entrance.