Barco DP100, XLM, DP90 User Manual
Cooling liquid refurbishment
Installation manual
For XLM, DP90 and DP100
R59770032/01
07/12/2006
Barco nv Events
aan 5, B-8520 Kuurne
Noordl
Phone: +32 56.36.89.70
Fax: +32 56.36.88.24
sales.events@barco.com
E-mail:
Visit us at the web: www.barco.com
PrintedinBelgium
1. LIQUID COOLING CIRCUIT
Overview
• Safety
• Introduction
• Diagnostics
1.1 Safety
WARNING: Hazardous product: Blue antifreeze diluted 1,2 ethanediol (1/3 ethanediol – 2/3 Demi water).
Not for h ousehold use. Keep out of reach of children. Harmful by oral intake. Avoid exposure to pregnant
women. Avoid contact with eyes, skin and clothing. Avoid inhale of the noxious fumes.
Handling the cooling liquid
• Avoid contact of the liquid with Eyes, Skin and Clothing.
• Avoid inhaling of the noxious fumes.
• Conserve the product in the original package and in a well ventilated room.
1. Liquid Cooling Circuit
Personal protection rules
• Handle the cooling liquid in a w ell ventilated room.
• Under no circumstances eat, drink and smoke while handling the liquid.
• Wear gloves (Butylrubber, PVC....) and Goggles.
• Wear suitable protection clothing.
1.2 Introduction
Functionality
Much heat has to be extracted from the DMD’s and from the light pipe entrance during operation of the projector. The liquid cooling
circuit takes care of this. The liquid cooling circuit is a closed loop of flexible tubing comprising of a pump, three cooling blocks for
the DMD ’s, a cooling block for the light pipe entrance, a heat exchan
inside the circuit absorbs the heat of the cooling blocks. Via the pump, the heated-up liquid is transported to the heat exchanger,
which in turn cools down the liquid.
The pressure vessel in the circuit makes it possible to put a small pressure on the cooling liquid. The required pressure exerted via
the pressure vessel serves to prevent cavitation an d hence ensures the good working condition of the pump. Note that the pressure
doesn’t influence the cooling capacity of the system.
ger, a pressure vessel and a manometer. The cooling liquid
R59770032 COOLING LIQUID REFURBISHMENT 07/12/2006
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1. Liquid Cooling Circuit
Parts of the liquid cooling circuit
K
J
A
I
Image 1-1
A DMD - Peltier cooling block.
B Manometer.
C Pressure vessel.
D Outlet cooling circuit
E Inlet cooling circuit
F Vane
GPump.
H Cooling block light pipe entrance.
I Flow switch.
J Heat exchanger.
H Transparent tube for visual check.
B
C
D
E
F
G
H
2
R59770032 COOLING LIQUID REFURBISHMENT 07/12/2006
Block diagram of the cooling circuit
1. Liquid Cooling Circuit
Heat
Exchanger
Waterflow Sensor
Expansion Vat
Engine
Pressure relief
valve (3 Bar)
Pump
Manometer
Vane
Light Pipe
entry
Outlet
Inlet
Outlet
Inlet
Vane
to SMPS Control
Image 1-2
Block diagram cooling circuit
Order info liquid cooling
Order number
R395198K
B1909086K
Description
Complete liquid cooling refill kit. Includes tubes, valved fittings, syringe, air pump, plastic bottle of 1 liter
filled with cooling liquid and one empty plastic bottle of 1 liter.
Two bottles of 1 liter filled with cooling liquid. (no additional tools)
1.3 Diagnostics
General
Over extended periods theremay be small losses ofpressure in the liquid c ooling system of the projector. It is there for recommended
to check the pressure at regular intervals. In case the pressure drops below 0,5 bar it is recommended to restore the pressure o f
the liquid cooling system.
CAUTION: In case of a rapid l oss in pressure check the liquid cooling circuit for leakage. Solve the problem
before starting up the projector.
Troubleshooting cooling loop
• Any significant or rapid drop in pressure indica tes a leakage of liquid. If this be the case, verify whether the circuit shows any
visible sign of liquid leakage.
• As critical components rely on this liquid cooling, it is essential that any leakage is detected timely.
• Periodic checking of the liquid cooling pressure is essential to guarantee overall good performance of the projector and the
pump.
• The factory pressure preset is approximately 1 bar in the ’Projector Off’ status at a room temperature of 25 °C. This may drop
slightly during operation.
R59770032 COOLING LIQUID REFURBISHMENT 07/12/2006
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1. Liquid Cooling Circuit
Toohighambienttemperature
An Error or warning m essage “Ambient temp high” is displayed on the local LCD panel or touch panel. See manual of the projector
for accessing error messages.
Possible cause
Ambient temperature of the projector is too high.
Blocked filter at the front side and the left side of the projector Clean the blocked filter.
Solution
Measure the ambient temperature nearby the projector. In
case the measured temperature is higher than 40 °C take
the necessary measurements to ensure that the ambient
temperature is below 40 °C.
One of the DMD’s is too high in temperature
An Error or warning message “DMD temp high” is displayed on the local LCD panel or touch panel. See manual of the projector for
accessing error messages.
Possible cause
Malfunction Peltier element of the inv
DMD is too high in temperature while the other two DMD’s
have a normal and almost equal temperature.
The wire units of two Peltier elements or there respective
temperature sensors (NTC’s) have been swapped. While the
temperature of one DMD is too high,
be to low.
Poor assembly of DMD or Peltier + cooler block.
olved DMD. Only one
the other will most likely
Solution
1. Check if the wire unit of the involved Peltier is conn ected
with the interface board.
2. Check if the wire unit of the temperature sensor (NTC) is
connected with the interface boa
3. Check the fan control board. In case of malfunctioning
replace the board.
4. Defect Peltier element. Replace Pe
Check if the wire units of all Peltiers and all temperature
sensors (NTC’s) are plugged in there respective connector
sockets on the interface board.
Reinstall the Peltier.
rd.
ltier.
All DMD’s are too high in temperature
An Error or warning message “DMD temp high” is displayed on the local LCD panel.
Possible cause
The liquid cooling circuit of the light pro cessor is mistakenly
excluded from the main liquid cooling circuit.
None of the wire units of the Peltier elements or there
respective temperature sensors (NTC’s) are connected.
Blocked filter of the heat exchanger. Clean the blocked filter.
Solution
Check of the cooling circuit of the light processor is connected
with the pump and heat exchanger.
Check if the wire units of all Peltiers and all temperature
sensors (NTC’s) are plugged in there respective connector
sockets on the interface board.
No flow of the cooling liquid
An Error message “Water flow” is displayed on the local LCD pa nel.
Possible cause
Interruption of the liquid cooling circuit. Check if the loop of the liquid cooling circuit is closed.
No or insufficient liquid inside the cooling circuit. The pump is
sucking air and sounds noisier then normal.
Solution
Fill the cooling circuit with liquid and expel all air. Pressurize
the circuit.
4 R59770032 COOLING LIQUID REFURBISHMENT 07/12/2006
1. Liquid Cooling Circuit
Possible cause
Defect pump. When the projector is running, you don’t feel
any vibrations when touching the pump
Defect flow switch. The pump is functioning normally but the
projector displays a water flow error.
Solution
Drain the liquid cooling circuit, replace the pump, fill and
pressurize the liquid cooling circuit.
Tip: It’s not necessary to drain the cooling circuit of the light
processor. Bypass this part of the cooling circuit.
Drain the liquid cooling circuit, replace the flow switch, fill and
pressurize the liquid cooling circuit.
Tip: It’s not necessary to drain the cooling circuit of the light
processor. Bypass this part of the cooling circuit.
R59770032 COOLING LIQUID REFURBISHMENT 07/12/2006 5
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