The pump of the water cooling is electrical disconnected.

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

Malfunction pump of the cooling circuit. You don't feel anyvibrations when touching the pump after activating the “Refillmode” via the Communicator software.

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

2. Drain the liquid cooling circuit, open the pump and check ifthe pump rotor is not blocked. If so, remove the rotor (referenceB) and clean the bearingsof the pump. See service manual chapter Cleaning the cooling pump.

Wire unit of the fans and motor units (reference W ) disconnected from the Power Backplane.

Remove the Input & Communication unit and check if the wireunit is inserted in the Power Backplane.

Malfunction Fan & Motor Control board

Replace the Fan & Motor Control board. See service manualchapter Replacement of the Fan & Motor Control board.

Pump end of life.

Replace the pump. See service manual chapter Replacement of the complete cooling pump.

Malfunction SMPS board.

Measure voltage on pump wire while in refill mode. Voltage shouldbe at least 20V. If voltage is incorrect then replace the SMPS board.