Barco FLM series Service Manual page 36

3. Troubleshooting
Situation
The liquid cooling circuit of the light
processor is mistakenly excluded
from the main liquid cooling circuit.
Water cooling pump electrical
disconnected.
Blocked high density filter of the
heat exchanger.
No or insufficient liquid inside the
cooling circuit. The pump is sucking
air and sounds noisier then normal.
Malfunction pump of the water
cooling circuit. You don't feel any
vibrations when touching the pump
after activating the "Refill mode" via
the user interface:
Service > Refill mode >
Yes
Note: to exit the "Refill mode" you
have to switch off the projector.
Error 7670 : "Red block temp short"
This error may be preceded by a warning. This error can only appear on the FLM HD series.
Situation
Damaged insulation of the wire unit
of the temperature sensor (ref R
image 3-15), which measures the
temperature of the water cooling
block of the red channel. When
disconnecting the wire unit (ref R/BL
image 3-11) of the temperature
sensor from the Formatter Interface
Board (FIB) the error code is
changed to 7671 : "Red block temp
open".
Defect temperature sensor (ref R
image 3-15) on the water cooling
block of the red channel. When
disconnecting the wire unit of
the temperature sensor from the
Formatter Interface Board (FIB) the
error code is changed to 7671 :
"Red block temp open".
Image 3-15
34
Solution
Reconnect the cooling circuit of the light processor with the pump and heat exchanger.
Check if the wire unit (ref C image 3-13) of the pump is properly connected.
Replace the blocked high density filter with a new one.
Fill the cooling circuit with liquid and expel all air. Pressurize the circuit. See "FLM
liquid cooling circuit", page 153.
• Check the electrical resistance of the pump's winding. Replace the pump if infinite.
See "Cooling pump replacement", page 197.
• Drain the liquid cooling circuit, open the pump and check if the pump is not blocked.
If so, remove the rotor (ref R image 3-13) and clean the bearings of the pump. See
"Maintaining the cooling pump", page 190.
Solution
• Repair the insulation of the wire unit using shrink sleeve.
• If not repairable, replace the whole wire unit and temperature sensor.
Replace the temperature sensor.
R
R59770072 FLM SERIES 19/03/2007