Blocked filter of the Heat Exchanger. The other DMD temperatures are too high as well.

Clean filter of the heat exchanger (bottom side) or replace with a new oner. See "Clean the dust filter on the bottom side".

The liquid cooling circuit of the Light Processor is mistakenly excluded from the main liquid cooling circuit. Most likely the other DMD temperatures are too high as well.

Check of the cooling circuit of the Light Processor is connected with the pump and heat exchanger.

The Peltier element (TEC) of the DMD in the green channel is disconnected from the Signal Backplane.

Check if the wire unit (reference 22 image "Temp sensor and Peltier connection green DMD") of the Peltier element (TEC) of the DMD in the green channel is connected with the Signal Backplane.

The wire units of two Peltier elements (TEC) or there respective temperature sensors (NTC's) have been swapped. While the temperature of one DMD is too high, the other will most likely be too low.

Check if the wire units of all Peltiers (TEC) and all temperature sensors (NTC's) are plugged in their respective connector sockets on the Signal Backplane. See image "Temp sensor and Peltier connection green DMD".

Note that there are two temperature sensors per channel. The first sensor is visible on top of the cooling block. The second sensor is located at the front of the DMD.

Malfunction Fan Control board or SMPS board. The LED “+VTEC” on the Fan Control board remains off.

Measure on the Signal Backplane the +VTEC voltage on pin 4, 5, 6, 7 or 8 of the connector of the black wire unit which comes from the SMPS board. See image.

If the +VTEC voltage is about 16V then replace the Fan Control board. See "Removing a board in the card cage". Otherwise replace the SMPS board. See "Replacement of the Switched Mode Power Supply"..

Malfunction Peltier element (TEC) of the involved DMD. Use the “diode test” of a multi-meter to check out the Peltier. Polarity doesn’t matter. The Peltier is not OK in case the measured value is higher then 0,01 volt.

Remove the Light Processor from its compartment and contact Barco for further instructions.

Poor assembly of DMD or Peltier + cooler block.

Remove the Light Processor from its compartment and contact Barco for further instructions.

Defect temperature sensor which measures the temperature at the front side of the DMD of the green channel.

Replace the whole Light Processor Unit. Contact Barco for further instructions to repair the malfunction Light Processor Unit. It is too critical to replace this temperature sensor in the field. The replacement of this temperature sensor must be done at factory or at an authorized service center.