4000 Periodic Maintenance
Service Manual 1-1
1. Periodic Maintenance
1.1 General
This Service Manual describes the following instruments:
− AVL DiGas 4000 (= AVL DiTest 5400)
− AVL DiSmoke 4000 (= AVL DiTest 5430)
− AVL DiCom 4000 (= AVL DiTest 5460)
Some areas are described in detail in the respective Operating Manual and therefore not
dealt with in this Service Manual.
We therefore advise always using the Service Manual
together with the respective Operating Manual.