AVL AVL DiCom 4000, Service Manual

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4-/5-Gas Measuring Instruments Unit AVL 4000
5-14 Service Manual
5.8 Error Symptom List - Remedies
The remedies apply to the 4/5-gas bench of the AVL DiGas/DiCom 4000 and the AVL DiGas 465.
Primary error symptom Primary cause
(of error)
Secondary cause of
error Possible tests/
establishing cause Remedy
Andros power
supply unit faulty Short circuit in
electronics
Operating
temperature too
high
Poor soldering
Mains voltage too
low (<90 V; applies
to 110 V devices)
Error message
measuring chamber
faulty?
Can you smell
burning?
Can you hear
whistling?
Chopper can be
moved easily
Replace Andros
power supply unit
Transformer faulty
(465)
−
Short circuit in
electronics
−
Operating
temperature too
high
−
Transformer
short circuit
−
Transformer
winding
interrupted
Error message
measuring chamber
faulty
Can you smell
burning?
Replace transformer
(465)
Transformer bar
burned out Faulty contact Smell of burning? Replace transformer
or transformer bar
(465)
Faulty cable
connection in
transformer Crimp plug has bad
contact Check cable
connections and
crimp plug Connect cable or
repair crimp lug (465)
Chopper faulty
Chopper vane loose
or motor faulty
Chopper vane is
catching; clicking
sound can (often/
always) be heard Error message
measuring chamber
faulty
Chopper vane loose
Chopper motor
loose
Replace measuring
instruments unit
Fault in electronics Pneumatics board Error message
measuring chamber
faulty but clicking
can be heard on
power up, chopper
is working Replace pneumatics
board (465)
Fault in electronics Electronics in
measuring
instruments unit
Error message
measuring chamber
faulty Replace measuring
instruments unit
Measuring instruments
unit not functioning
Fault in electronics
on lambda
piggyback Processor or
capacitor error Chopper motor is
stuck, can be moved Replace measuring
instruments unit