AVL DiGas 4000 - System Needs Restarting; Measuring Chamber Temperature too High

Error Messages and Troubleshooting AVL 4000
2-2 Service Manual
2.1.2 System Needs Restarting
If two consecutive attempts at restarting do not return the tester to normal operating
mode, the measuring instruments unit must be defective.
• Remove the unit (see Dismantling the 4-/5-Gas Measuring Instruments Unit) and
check the
− measuring cell
− receiver
− light source
• Check the cable between the main board and the measuring instruments unit
2.1.3 Measuring Chamber Temperature Too High
•
Remove the probe from the exhaust pipe (because when this error occurs, the tester
switches to zero calibration mode and needs to draw in fresh air).
• Do not switch the tester off!
• Wait at least 10 min
• Acknowledge the error by pressing >>,
− Select “Measurement” again.
• If the same error message appears again, there is a fault in the measuring instruments
unit.
• Remove the unit (see Dismantling the 4-/5-Gas Measuring Instruments Unit).
• Check the cable to the receiver / replace the unit if necessary (i.e. filter/receiver).