AVL DiGas 4000 - Main Board and Lambda Piggyback; Causes of Error; Layout of Pneumatics

4000 4-/5-Gas Measuring Instruments Unit
Service Manual 5-5
5.2.6 Main Board and Lambda Piggyback
• Replace the complete analyzer unit.
5.2.7 Causes of Error
Measuring cell temperature yellow wire might be broken re-solder
Gas display not stable
(channel is dead)
10-pin ribbon cable to receiver is
defective
check
5.3 Layout of Pneumatics
Fig. 5-3
Activated
carbon filter
Solenoid valveValve unit
Particulate
filter
Condensate
trap
Pump
Measuring
instruments unit