AVL AVL DiCom 4000, Service Manual

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4-/5-Gas Measuring Instruments Unit AVL 4000
5-26 Service Manual
Primary error symptom Primary cause
(of error)
Secondary cause of
error Possible tests/
establishing cause Remedy
Pump does not
switch off Cable faulty (465),
pcb faulty
Pneumatics board
faulty
EPROM faulty (465) Service mode: test
function Use edge protectors
(465)
If necessary, replace
pump or pneumatics
board
Pump does not
switch on Control cable (465)
faulty
pcb faulty
Pneumatics board
faulty Service mode: test
function Use edge protectors
(465)
If necessary, replace
pump or pneumatics
board
Pump is loose Loud noise and
vibrations Tighten screws and
secure with Loctite
Pump faulty
Pump cable worn
through (465) See “Self-test and
stabilisation” Use edge protectors
(465)
Insulation
Pump very noisy Screws loose Check Tighten screws and
secure with Loctite
Software error Communication Test pump in service
mode and let it run Replace pneumatics
board (465)
Replace measuring
instruments unit
Pump faulty Internal short
circuit/loose contact Test pump in service
mode and let it run Replace pump
Pump cable faulty
(465) Intermittent short
circuit Test pump in service
mode and let it run Insulate cable (465)
EPROM faulty
(465) ESD or EMC Replace EPROM
(465)
Pump switches itself
on or off
Pneumatics board
faulty Overheated driver
on pcb?
Very hot? Replace pneumatics
board
(Replace measuring
instruments unit)