Diagnostics - Barco FLM series Service Manual

16.3 Diagnostics

General
Over extended periods there may be small losses of pressure in the liquid cooling system of the projector. It is therefor recommended
to check the pressure at regular intervals. In case the pressure drops below 0,5 bar it is recommended to restore the pressure of
the liquid cooling system.
C
AUTION
before starting up the projector.
Troubleshooting cooling loop
• Any significant or rapid drop in pressure indicates 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.
Too high ambient temperature
An Error or warning message "Ambient temp high" is displayed on the local LCD panel.
Possible cause
Ambient temperature of the projector is too high.
Blocked high density filter at the front side of the projector
One of the DMD's is too high in temperature
An Error or warning message "[Red/Green/Blue] DMD temp high" is displayed on the local LCD panel.
Possible cause
Malfunction Peltier element of the involved DMD. Only one
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, the other will most likely
be to low.
Poor assembly of DMD or Peltier + cooler block.
All DMD's are too high in temperature
An Error or warning message "[Red/Green/Blue] DMD temp high" is displayed on the local LCD panel.
Possible cause
The liquid cooling circuit of the light processor is mistakenly
excluded from the main liquid cooling circuit.
R59770072 FLM SERIES 19/03/2007
:
In case of a rapid loss in pressure check the liquid cooling circuit for leakage. Solve the problem
16. FLM liquid cooling circuit
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.
Replace the blocked high density filter at the front side of the
projector with a new high density filter.
Solution
1. Check if the wire unit of the involved Peltier is connected
with the interface board.
2. Check if the wire unit of the temperature sensor (NTC) is
connected with the interface board.
3. Check the fan control board. In case of malfunctioning
replace the board.
4. Defect Peltier element. Replace Peltier.
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.
Solution
Check of the cooling circuit of the light processor is connected
with the pump and heat exchanger.
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