4000 4-/5-Gas Measuring Instruments Unit
Service Manual 5-27
Primary error symptom Primary cause
(of error)
Secondary cause of
error
Possible tests/
establishing cause
Remedy
Temperature range 5 to 40° C (465)
temperature range 5 to 45° C (4000)
exceeded or undershot
Ensure required
operating conditions
Instrument place in room near door,
significant temperature fluctuations
Ensure required
operating conditions
Instrument placed near radiator Ensure required
operating conditions
Instrument place in hot sunshine Ensure required
operating conditions
Petrol or solvent in the ambient air Air the room
Mains interference due to powerful
power-consuming equipment
Use a different plug
socket
EMC interference due to drills, welding
apparatus, radio equipment
Clear or suppress
interference
General
EMC interference due to defective
automobile/truck ignitions
Clear or suppress
interference
The status values ES, CO2CS, COCS, HCCS, SCCS, ZS, DSM
and the raw data displayed in service mode can be used for
more detailed error analysis.
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