Code 5291: “dmdblue - temperature high” (Warning)

Situation	Solution
Blocked high density filter of the heat exchanger. The otherDMD temperatures are too high as well.	Replace the blocked high density filter of the heat exchangerwith a new high density filter. See service manual chapter Replacement of the dust filter on the bottom side.
The liquid cooling circuit of the light processor is mistakenlyexcluded from the main liquid cooling circuit. Most likely the otherDMD temperatures are too high as well.	Check of the cooling circuit of the light processor is connectedwith the pump and heat exchanger.
The Peltier element (TEC) of the DMD in the blue channel isdisconnected from the Formatting Interface Board.	Check if the wire unit (reference TB ) of the Peltier element (TEC) of theDMD in the blue channel is connected with the Formatting InterfaceBoard.
The wire unit of the temperature sensor (NTC) of the DMD inthe blue channel is disconnected from the Formatting Interface Board.	Check if the wire unit (reference SB ) of the temperature sensor (NTC) of theDMD in the blue channel is connected with the Formatting InterfaceBoard.
The wire units of two Peltier elements (TEC) or there respectivetemperature sensors (NTC's) have been swapped. While the temperatureof one DMD is too high, the other will most likely be too low.	Check if the wire units of all Peltiers (TEC) and all temperaturesensors (NTC's) are plugged in there respective connector socketson the Formatting Interface Board. See . Note that there are three temperature sensors per channel. Thefirst sensor is visible on top of the cooling block. The second sensor(reference SB) fits between the Peltier element and DMD. The thirdsensor is located at the front of the DMD.
Malfunction Fan & Motor Control board. The LED “+VTEC”on the Fan & Motor Control board remains off.	Replace the Fan & Motor Control board.
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 themeasured value is higher then 0,01 volt.	Remove the light processor from its compartment and replacethe malfunction Peltier element. If problem persist contact Barcofor further instructions.
Poor assembly of DMD or Peltier + cooler block.	Reinstall the Peltier element.
Defect temperature sensor which measures the temperature atthe rear side of the DMD of the blue channel.	Replace the whole Light Processor Unit. Contact Barco for furtherinstructions to repair the malfunction Light Processor Unit. It istoo critical to replace this temperature sensor in the field. Thereplacement of this temperature sensor must be done at factory orat an authorized service center.

SB	Wireunit of temperature sensor at the rear of the DMD of the blue channel.
SG	Wireunit of temperature sensor at the rear of the DMD of the green channel.
SR	Wireunit of temperature sensor at the rear of the DMD of the red channel.
TB	Wireunit of Peltier element at the rear of the DMD of the blue channel.
TG	Wireunit of Peltier element at the rear of the DMD of the green channel.
TR	Wireunit of Peltier element at the rear of the DMD of the red channel.
L	Wire unitof the temperature sensor on the cooling block at the light pipe entrance.
CA	Wireunit of the cat eye (contrast plate).
SH	Wireunit of the shutter.
LS	Wireunit of the light sensor inside the light pipe (behind the fold mirror).