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 mistakenlyexcluded from the main liquid cooling circuit.

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

The pump of the water cooling is electrical disconnected.

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

Blocked high density filter of the heat exchanger.

Replace the high density filter. See service manual chapter Replacement of the dust filter on the bottom side.

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

Fill the cooling circuit with liquid and expel all air. Pressurizethe circuit.

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.

Defect temperature sensor (Reference S ) on the water cooling block of the LightPipe entrance.

Replace the temperature sensor on the Light Pipe entrance.

Malfunction Formatting Interface Board.

Replace the Formatting Interface Board (FFIB).

Misalignment of the lamp inside the lamp house.

1. Readjust the Z-alignment of the lamp. See service manual chapter Realignment of the lamp in its reflector.

2. Replace the lamp house with a new lamp house. See service manualchapter Removal of the lamp house.

Misalignment of the cold mirror.

Readjust the cold mirror. See service manual chapter Adjusting the cold mirror.